tools/metrics/histograms/metadata/download/histograms.xml

<!--
Copyright 2020 The Chromium Authors
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->

<!--
This file is used to generate a comprehensive list of Download histograms
along with a detailed description for each histogram.

For best practices on writing histogram descriptions, see
https://chromium.googlesource.com/chromium/src.git/+/HEAD/tools/metrics/histograms/README.md

Please follow the instructions in the OWNERS file in this directory to find a
reviewer. If no OWNERS file exists, please consider signing up at
go/reviewing-metrics (Googlers only), as all subdirectories are expected to
have an OWNERS file. As a last resort you can send the CL to
chromium-metrics-reviews@google.com.
-->

<histogram-configuration>

<histograms>

<variants name="DownloadBubbleViewType">
  <variant name="Full"/>
  <variant name="Partial"/>
</variants>

<variants name="DownloadClient">
  <variant name="__Test__"/>
  <variant name="BackgroundFetch"/>
  <variant name="Bruschetta"/>
  <variant name="Debugging"/>
  <variant name="MountainInternal"/>
  <variant name="OfflinePage"/>
  <variant name="OptimizationGuidePredictionModels"/>
  <variant name="PluginVmImage"/>
</variants>

<variants name="DownloadDangerTypeString">
  <variant name="AllowlistedByPolicy"/>
  <variant name="AsyncScanning"/>
  <variant name="BlockedPasswordProtected"/>
  <variant name="BlockedTooLarge"/>
  <variant name="BlockedUnsupportedFiletype"/>
  <variant name="DangerousAccountCompromise"/>
  <variant name="DangerousContent"/>
  <variant name="DangerousFile"/>
  <variant name="DangerousHost"/>
  <variant name="DangerousURL"/>
  <variant name="DeepScannedOpenedDangerous"/>
  <variant name="DeepScannedSafe"/>
  <variant name="MaybeDangerousContent"/>
  <variant name="NotDangerous"/>
  <variant name="PotentiallyUnwanted"/>
  <variant name="PromptForScanning"/>
  <variant name="SensitiveContentBlock"/>
  <variant name="SensitiveContentWarning"/>
  <variant name="UncommonContent"/>
  <variant name="UserValidated"/>
</variants>

<histogram name="Download.ApiFunctions" enum="DownloadFunctions"
    expires_after="2023-10-15">
  <owner>dtrainor@chromium.org</owner>
  <owner>xinghuilu@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Downloads extension API function calls. Warning: this histogram was expired
    from 2020-03-08 to 2022-08-02; data may be missing.
  </summary>
</histogram>

<histogram name="Download.AttachmentServices.Duration" units="ms"
    expires_after="never">
<!-- expires-never: Monitors downloads system health -->

  <owner>dtrainor@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Time taken to invoke IAttachmentExecute::Save() excluding the time taken to
    instantiate CLSID_AttachmentServices. Warning: this histogram was expired
    from 2020-02-23 to 2023-01-30; data may be missing.
  </summary>
</histogram>

<histogram name="Download.BandwidthOverallBytesPerSecond2" units="bytes/second"
    expires_after="2023-10-08">
  <owner>qinmin@chromium.org</owner>
  <summary>
    Overall bandwidth seen for a completed download. This includes all file
    downloads going through the download subsystem, but excludes all the page
    saves. Note that this is measured at the point at which the file is written,
    and so will not take into account the time costs of activities that occur
    after file write is completed (e.g. safe browsing scanning). The maximum
    bucket range is 200Mbps.
  </summary>
</histogram>

<histogram name="Download.Bubble.DragInfo" enum="Download.DragInfo"
    expires_after="2023-09-03">
  <owner>xinghuilu@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    This tracks drag events on a complete download on the bubble, and also
    general download completion on the bubble as a point of reference. Note that
    the completion can be logged multiple times for a single download if the
    download bubble is shown and dismissed multiple times.
  </summary>
</histogram>

<histogram name="Download.Bubble.LoadAndSetIconLatency" units="ms"
    expires_after="2023-08-20">
  <obsolete>
    Removed 2023-02-24: no longer needed, and now inconvenient to log properly.
  </obsolete>
  <owner>chlily@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Measures the time (in ms) taken to load and set the file icon for a download
    on the download bubble. Recorded each time an icon is loaded and set, which
    can happen upon adding or updating a download bubble row, or changing the
    device scale factor.
  </summary>
</histogram>

<histogram name="Download.Bubble.PartialToFullViewLatency" units="ms"
    expires_after="2023-08-27">
  <owner>drubery@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Measures the time (in ms) the user takes to open a full view (opened
    manually) after seeing a partial view (opened by the browser for new and
    completed downloads). Recorded only if the user has launched a full view
    after a partial view was opened in the past, with no full view launch in
    between. Recorded only for Desktop platforms, where Download Bubble is
    enabled.
  </summary>
</histogram>

<histogram name="Download.Bubble.ProcessedCommand" enum="DownloadCommand"
    expires_after="2023-08-27">
  <owner>xinghuilu@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Records each time a download command is executed on download bubble. For V1,
    it is logged when the main button is clicked. For V2, it is logged when the
    quick action is clicked. Actions on the security subpage is also included.
    Actions on context menu are excluded. Clicking the trasparent button is also
    excluded. This histogram is added for debugging purpose and will be removed
    afterwards.
  </summary>
</histogram>

<histogram
    name="Download.Bubble.Subpage.{DownloadDangerTypeString}.{ButtonType}ButtonActionTime"
    units="ms" expires_after="2024-03-07">
  <owner>chlily@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Measures the time (in ms) between the Download bubble warning subpage being
    shown, and one of the buttons being acted upon. The warning subpage is shown
    when the user sees a download warning on the full or the partial view, and
    navigates to the subpage for more actions. Recorded only for Desktop
    platforms, where Download Bubble is enabled. In M105, FirstButtonActionTime
    is replaced with SecondaryButtonActionTime, SecondButtonActionTime is
    replaced with PrimaryButtonActionTime.
  </summary>
  <token key="ButtonType">
    <variant name="Primary"/>
    <variant name="Secondary"/>
  </token>
  <token key="DownloadDangerTypeString" variants="DownloadDangerTypeString"/>
</histogram>

<histogram name="Download.Bubble.SubpageAction"
    enum="DownloadBubbleSubpageAction" expires_after="2023-08-20">
  <owner>drubery@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Record the user actions taken on the Download bubble warning subpage. The
    warning subpage is shown when the user sees a download warning on the full
    or the partial view, and navigates to the subpage for more actions. Recorded
    only for Desktop platforms, where Download Bubble is enabled.
  </summary>
</histogram>

<histogram name="Download.Bubble.{DownloadBubbleViewType}View.VisibleTime"
    units="ms" expires_after="2024-03-07">
  <owner>chlily@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Measures the time (in ms) for which the full view (opened manually) or the
    partial view (opened by the browser for new and completed downloads) are
    visible. Recorded only for Desktop platforms, where Download Bubble is
    enabled.
  </summary>
  <token key="DownloadBubbleViewType" variants="DownloadBubbleViewType"/>
</histogram>

<histogram name="Download.Bubble.{DownloadBubbleViewType}ViewSize"
    units="items" expires_after="2024-03-07">
  <owner>chlily@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Measures the size of the full view (opened manually) or the partial view
    (opened by the browser for new and completed downloads). The full view
    contains all recent downloads (last 24 hours), and the partial view contains
    all recent downloads that user has not paid attention to, or acted upon.
    Recorded only for Desktop platforms, where Download Bubble is enabled.
  </summary>
  <token key="DownloadBubbleViewType" variants="DownloadBubbleViewType"/>
</histogram>

<histogram name="Download.CancelReason" enum="DownloadCancelReason"
    expires_after="2023-10-08">
  <owner>qinmin@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>Records why the download is canceled.</summary>
</histogram>

<histogram name="Download.Complete.IsOpenWhenCompleteSet" enum="BooleanSet"
    expires_after="2023-08-27">
  <owner>xinghuilu@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Records each time a non-temporary download is completed. If it is set to
    true, this download will open immediately. This can happen if the user has
    clicked the open button before the download is completed. This histogram is
    added for debugging purpose and will be removed afterwards.
  </summary>
</histogram>

<histogram name="Download.Complete.IsShouldOpenFileBasedOnExtensionSet"
    enum="BooleanSet" expires_after="2023-08-27">
  <owner>xinghuilu@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Records each time a non-temporary download is completed. If it is set to
    true, this download will open immediately. This can happen if the user has
    set auto open for this file type. This histogram is added for debugging
    purpose and will be removed afterwards.
  </summary>
</histogram>

<histogram name="Download.ContentType.Audio" enum="DownloadAudioType"
    expires_after="never">
<!-- expires-never: Monitors download system health. -->

  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>Types of audio files that are downloaded.</summary>
</histogram>

<histogram name="Download.ContentType.Image" enum="DownloadImageType"
    expires_after="never">
<!-- expires-never: Monitors download system health. -->

  <owner>dtrainor@chromium.org</owner>
  <summary>Types of images that are downloaded.</summary>
</histogram>

<histogram name="Download.ContentType.Text" enum="DownloadTextType"
    expires_after="never">
<!-- expires-never: Monitors download system health. -->

  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>Types of text files that are downloaded.</summary>
</histogram>

<histogram name="Download.ContentType.Video" enum="DownloadVideoType"
    expires_after="never">
<!-- expires-never: Monitors download system health. -->

  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>Types of video files that are downloaded.</summary>
</histogram>

<histogram base="true" name="Download.Counts" enum="DownloadCountType"
    expires_after="2023-10-22">
<!-- Name completed by histogram_suffixes name="DownloadSource" -->

  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>
    Various individual counts in the download system; see DownloadCountType for
    details.
  </summary>
</histogram>

<histogram name="Download.DangerousDialog.Events"
    enum="DangerousDownloadDialogEvent" expires_after="2023-09-03">
  <owner>qinmin@chromium.org</owner>
  <summary>
    Records user interactions with the dangerous download dialog on Android.
    Records when the dialog is shown, or when user clicks on a button or
    dismisses the dialog.
  </summary>
</histogram>

<histogram name="Download.DangerousFile.DownloadValidatedByType"
    enum="SBClientDownloadExtensions" expires_after="2023-10-08">
  <owner>drubery@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    User chose to save a download which was marked DANGEROUS_FILE. Grouped by
    the type of file.
  </summary>
</histogram>

<histogram name="Download.Database.IsAvailable" enum="BooleanAvailable"
    expires_after="never">
<!-- expires-never: Helpful to track download database issue. -->

  <owner>qinmin@chromium.org</owner>
  <summary>
    Records whether the download database is available when database startup
    completes, before starting any pending downloads. If the database is
    available, it will provide the next download id. Or no download history will
    be persisted.
  </summary>
</histogram>

<histogram name="Download.DeleteRetentionTime.Audio" units="hours"
    expires_after="2020-01-30">
  <owner>qinmin@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>
    How long users keep downloaded audio files on disk. Recorded when the
    downloaded file is deleted.
  </summary>
</histogram>

<histogram name="Download.DeleteRetentionTime.Video" units="hours"
    expires_after="2020-01-30">
  <owner>qinmin@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>
    How long users keep downloaded video files on disk. Recorded when the
    downloaded file is deleted.
  </summary>
</histogram>

<histogram name="Download.DOMEvent" enum="DownloadDOMEvent"
    expires_after="2023-10-08">
  <owner>dtrainor@chromium.org</owner>
  <owner>xinghuilu@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    User actions in chrome://downloads. Warning: this histogram was expired from
    M77 to 2022-09-20; data may be missing.
  </summary>
</histogram>

<histogram name="Download.DownloadDangerPrompt"
    enum="SBClientDownloadExtensions" expires_after="2023-08-27">
  <owner>vakh@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Records when user is shown the download danger prompt while attempting to
    recover a blocked download from chrome://downloads, grouped by the type of
    file.
  </summary>
</histogram>

<histogram name="Download.DownloadManagerImpl.CreateDownloadItemTime"
    units="ms" expires_after="2023-09-09">
  <owner>chlily@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Records time taken to execute DownloadManagerImpl::CreateDownloadItem(),
    logged on each execution.
  </summary>
</histogram>

<histogram name="Download.DownloadManagerImpl.PostInitializationTime"
    units="ms" expires_after="2023-09-09">
  <owner>chlily@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Records time taken to execute DownloadManagerImpl::PostInitialization(),
    logged on each execution unless the function returns early due to already
    being initialized.
  </summary>
</histogram>

<histogram base="true" name="Download.DownloadSize" units="KB"
    expires_after="never">
<!-- expires-never: Used for long term download system health monitoring. -->

<!-- Name completed by histogram_suffixes name="Download.Parallelizable" -->

  <owner>dtrainor@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>The size of successfully completed downloads.</summary>
</histogram>

<histogram name="Download.DuplicateDialogEvent.{Type}"
    enum="DuplicateDownloadEvent" expires_after="2022-12-03">
  <owner>qinmin@chromium.org</owner>
  <owner>clank-downloads@chromium.org</owner>
  <summary>
    Records user interactions on the duplicate download dialog on Android,
    either for a regular download or an offline page. One user interaction could
    trigger multiple histograms to be recorded. For example, clicking the text
    link could record both the link click histogram and the dialog dismiss
    histogram.
  </summary>
  <token key="Type">
    <variant name="Download"/>
    <variant name="OfflinePage"/>
  </token>
</histogram>

<histogram name="Download.DuplicateInfobarEvent.{Type}"
    enum="DuplicateDownloadEvent" expires_after="2022-04-03">
  <owner>qinmin@chromium.org</owner>
  <owner>clank-downloads@chromium.org</owner>
  <summary>
    Records user interactions on the duplicate download infobar on Android,
    either for a regular download or an offline page.
  </summary>
  <token key="Type">
    <variant name="Download"/>
    <variant name="OfflinePage"/>
  </token>
</histogram>

<histogram name="Download.HttpResponseCode" enum="HttpResponseCode"
    expires_after="never">
<!-- expires-never: Used to monitor download system health. -->

  <owner>qinmin@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>The count of HTTP Response codes for download requests.</summary>
</histogram>

<histogram name="Download.Incognito.Message" enum="IncognitoMessageEvent"
    expires_after="2023-06-30">
  <owner>tommasin@chromium.org</owner>
  <owner>chrome-incognito@google.com</owner>
  <summary>
    Records the clicks on Incognito download message in Android, when users
    click download or dismiss the message.
  </summary>
</histogram>

<histogram name="Download.InProgressDB.Counts"
    enum="DownloadInProgressDBCountType" expires_after="M83">
  <owner>qinmin@chromium.org</owner>
  <summary>
    Various individual counts related to in-progress download DB.
  </summary>
</histogram>

<histogram name="Download.InputStreamReadError"
    enum="DownloadInputStreamReadErrorType" expires_after="2023-08-31">
  <owner>qinmin@chromium.org</owner>
  <owner>shaktisahu@chromium.org</owner>
  <summary>
    Records errors when reading from the mojo input stream before a download
    completes.
  </summary>
</histogram>

<histogram base="true" name="Download.InsecureBlocking.Extensions"
    enum="InsecureDownloadExtensions" expires_after="2023-10-22">
  <owner>jdeblasio@chromium.org</owner>
  <owner>estark@chromium.org</owner>
  <owner>cthomp@chromium.org</owner>
  <summary>
    Records file extension of download to support analysis for mixed content
    file download blocking. Warning: this histogram was expired from M94 through
    M95; data may be missing.
  </summary>
</histogram>

<histogram name="Download.InsecureBlocking.Totals"
    enum="InsecureDownloadSecurityStatus" expires_after="2023-10-08">
  <owner>jdeblasio@chromium.org</owner>
  <owner>estark@chromium.org</owner>
  <owner>cthomp@chromium.org</owner>
  <summary>
    Records security state of downloads to support analysis for mixed content
    file download blocking.
  </summary>
</histogram>

<histogram base="true" name="Download.InterruptedReason" enum="InterruptReason"
    expires_after="never">
<!-- Name completed by histogram_suffixes name="DownloadSource" -->

<!-- expires-never: Core download metrics, used in go/chrome-download-dashboard. -->

  <owner>qinmin@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>The reason that a download was interrupted.</summary>
</histogram>

<histogram name="Download.Interstitial.UIAction"
    enum="DownloadInterstitialUIAction" expires_after="2023-09-26">
  <owner>alexmitra@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>
    Records any user action taken within a download interstitial. Download
    interstitials are shown only on Android inside CCTs.
  </summary>
</histogram>

<histogram name="Download.IOSDownloadARModelState.USDZ"
    enum="DownloadARModelState" expires_after="2023-10-25">
  <owner>sdefresne@chromium.org</owner>
  <owner>ewannpv@chromium.org</owner>
  <owner>mrefaat@chromium.org</owner>
  <summary>
    Logged at different stages of downloading a USDZ MIME type AR model on iOS.
  </summary>
</histogram>

<histogram name="Download.IOSDownloadCalendarFileUI"
    enum="DownloadCalendarFileUI" expires_after="2023-10-25">
  <owner>sdefresne@chromium.org</owner>
  <owner>ewannpv@chromium.org</owner>
  <owner>gambard@chromium.org</owner>
  <summary>
    Result when the warning alert is presented before downloading a .ics file on
    iOS. Values indicate if the user has continued the download workflow after
    the presentation of the warning alert.
  </summary>
</histogram>

<histogram name="Download.IOSDownloadedFileAction" enum="DownloadedFileAction"
    expires_after="2023-10-25">
  <owner>sdefresne@chromium.org</owner>
  <owner>ewannpv@chromium.org</owner>
  <owner>mrefaat@chromium.org</owner>
  <summary>
    The action that a user takes on a file after it has been successfully
    downloaded on iOS.
  </summary>
</histogram>

<histogram name="Download.IOSDownloadedFileNetError" enum="NetErrorCodes"
    expires_after="2023-10-25">
  <owner>sdefresne@chromium.org</owner>
  <owner>ewannpv@chromium.org</owner>
  <owner>mrefaat@chromium.org</owner>
  <summary>
    Positive net error codes that happen in the case of download content fetch
    failure.
  </summary>
</histogram>

<histogram name="Download.IOSDownloadFileInBackground"
    enum="DownloadFileInBackground" expires_after="2023-10-25">
  <owner>sdefresne@chromium.org</owner>
  <owner>ewannpv@chromium.org</owner>
  <owner>mrefaat@chromium.org</owner>
  <summary>
    Logged when the download is completed (successfully or not) or in-progress
    download was cancelled because of the app termination. This histogram
    includes information whether the download was successful and whether or not
    the download task was running while the app was active.
  </summary>
</histogram>

<histogram name="Download.IOSDownloadFileResult" enum="DownloadFileResult"
    expires_after="2023-10-25">
  <owner>sdefresne@chromium.org</owner>
  <owner>ewannpv@chromium.org</owner>
  <owner>mrefaat@chromium.org</owner>
  <summary>Result when a user attempts to download a file on iOS.</summary>
</histogram>

<histogram name="Download.IOSDownloadFileUI" enum="DownloadFileUI"
    expires_after="2023-10-25">
  <owner>sdefresne@chromium.org</owner>
  <owner>ewannpv@chromium.org</owner>
  <owner>mrefaat@chromium.org</owner>
  <summary>
    Result when a user attempts to present the download UI on iOS. Looged when
    download is created.
  </summary>
</histogram>

<histogram name="Download.IOSDownloadFileUIGoogleDrive"
    enum="DownloadFileUIGoogleDrive" expires_after="2023-10-25">
  <owner>sdefresne@chromium.org</owner>
  <owner>ewannpv@chromium.org</owner>
  <owner>mrefaat@chromium.org</owner>
  <summary>
    Result when the download UI is prexsented on iOS. Values indicate if Google
    Drive is installed and whether or not Install Google Drive promo was shown.
    Logged when download is updated.
  </summary>
</histogram>

<histogram name="Download.IOSDownloadMimeType" enum="DownloadMimeTypeResult"
    expires_after="2023-10-25">
  <owner>sdefresne@chromium.org</owner>
  <owner>ewannpv@chromium.org</owner>
  <owner>mrefaat@chromium.org</owner>
  <summary>
    MIME type of a download response. Logged when the download UI was offered by
    the browser to the user.
  </summary>
</histogram>

<histogram name="Download.IOSDownloadMobileConfigFileUI"
    enum="DownloadMobileConfigFileUI" expires_after="2023-10-25">
  <owner>sdefresne@chromium.org</owner>
  <owner>ewannpv@chromium.org</owner>
  <owner>gambard@chromium.org</owner>
  <summary>
    Result when the warning alert is presented before downloading a
    .mobileconfig file on iOS. Values indicate if the user has continued the
    download workflow after the presentation of the warning alert.
  </summary>
</histogram>

<histogram name="Download.IOSDownloadPassKitResult"
    enum="DownloadPassKitResult" expires_after="2024-02-14">
  <owner>sdefresne@chromium.org</owner>
  <owner>ewannpv@chromium.org</owner>
  <owner>mrefaat@chromium.org</owner>
  <summary>
    Recorded when a user attempts to download a PassKit file on iOS.
  </summary>
</histogram>

<histogram name="Download.IOSDownloadReplaced" enum="BooleanReplaced"
    expires_after="2023-10-25">
  <owner>sdefresne@chromium.org</owner>
  <owner>ewannpv@chromium.org</owner>
  <owner>mrefaat@chromium.org</owner>
  <summary>
    The user discarded in-progress download and replaced with the new one. Only
    recorded after the user interacts with a dialog offering the choice between
    replacing an in-progress download versus downloading separately to a new
    filename.
  </summary>
</histogram>

<histogram name="Download.IOSPresentAddPassesDialogResult"
    enum="PresentAddPassesDialogResult" expires_after="2023-10-25">
  <owner>sdefresne@chromium.org</owner>
  <owner>ewannpv@chromium.org</owner>
  <owner>mrefaat@chromium.org</owner>
  <summary>Result of an attempt to present Add Passes dialog on iOS.</summary>
</histogram>

<histogram name="Download.IOSPresentQLPreviewControllerResult"
    enum="PresentQLPreviewController" expires_after="2023-12-05">
  <owner>sdefresne@chromium.org</owner>
  <owner>ewannpv@chromium.org</owner>
  <owner>mrefaat@chromium.org</owner>
  <summary>
    Result when a user attempts to present a USDZ MIME type AR model on iOS.
  </summary>
</histogram>

<histogram name="Download.Later.Events" enum="DownloadLaterEvent"
    expires_after="2022-12-25">
  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>
    Records events for download later feature in download core code.
  </summary>
</histogram>

<histogram name="Download.Later.ScheduledDownloadSize" units="Mb"
    expires_after="2022-05-01">
  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>
    The size of downloads when the user tries to download at a scheduled time.
    Recorded when the positive button in download later dialog is clicked.
  </summary>
</histogram>

<histogram base="true" name="Download.Later.UI.DialogChoice"
    enum="DownloadLaterDialogChoice" expires_after="2022-10-09">
<!-- Name completed by histogram_suffixes name="DownloadDialogSource" -->

  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>
    The user selection in the download later dialog. Recorded when the user
    starts a download, or clicking the change button on download infobar and
    download home UI.
  </summary>
</histogram>

<histogram name="Download.Later.UI.Events" enum="DownloadLaterUiEvent"
    expires_after="2022-10-16">
  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>
    Records events for download later feature in download Android UI.
  </summary>
</histogram>

<histogram name="Download.LoadHistoryDownloads.AddExtensionInfoAndNotifyTime"
    units="ms" expires_after="2023-09-09">
  <owner>chlily@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Records the time taken to add the DownloadedByExtension data to the
    DownloadItem and notify observers in
    DownloadHistory::LoadHistoryDownloads(), logged on each loop iteration (once
    per DownloadRow) if extensions are enabled.
  </summary>
</histogram>

<histogram
    name="Download.LoadHistoryDownloads.DeserializeStoragePartitionConfigTime"
    units="ms" expires_after="2023-09-09">
  <owner>chlily@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Records the time taken to obtain the StoragePartitionConfig from the
    serialized embedder download data in
    DownloadHistory::LoadHistoryDownloads(), logged on each loop iteration (once
    per DownloadRow).
  </summary>
</histogram>

<histogram name="Download.LoadHistoryDownloads.DownloadRows" units="rows"
    expires_after="2023-09-09">
  <owner>chlily@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Records the number of rows passed to
    DownloadHistory::LoadHistoryDownloads(), logged on each execution.
  </summary>
</histogram>

<histogram name="Download.LoadHistoryDownloads.NotifyObserversTime" units="ms"
    expires_after="2023-09-09">
  <owner>chlily@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Records the total time taken to call OnHistoryQueryComplete() on all the
    observers in DownloadHistory::LoadHistoryDownloads(), logged on each
    execution of the latter.
  </summary>
</histogram>

<histogram name="Download.LoadHistoryDownloadsTime" units="ms"
    expires_after="2023-09-09">
  <owner>chlily@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Records time taken to execute DownloadHistory::LoadHistoryDownloads(),
    logged on each execution.
  </summary>
</histogram>

<histogram name="Download.MediaMetadata.Event" enum="MediaMetadataEvent"
    expires_after="never">
<!-- expires-never: Download media parser stability metrics. -->

  <owner>dtrainor@chromium.org</owner>
  <owner>qinmin@chromium.org</owner>
  <summary>Records events for local media metadata parsing.</summary>
</histogram>

<histogram name="Download.MediaParser.Event" enum="MediaParserEvent"
    expires_after="never">
<!-- expires-never: Download media parser stability metrics. -->

  <owner>dtrainor@chromium.org</owner>
  <owner>qinmin@chromium.org</owner>
  <summary>
    Records events when using media parser to analyze local media files.
  </summary>
</histogram>

<histogram name="Download.MixedContentDialog.Events"
    enum="MixedContentDownloadDialogEvent" expires_after="2022-12-11">
  <owner>qinmin@chromium.org</owner>
  <summary>
    Records user interactions with the insecure download (formerly the mixed
    content download) dialog on Android. Records when the dialog is shown, or
    when user clicks on a button or dismisses the dialog.
  </summary>
</histogram>

<histogram name="Download.Mobile.DangerousDownloadInfobarEvent"
    enum="DangerousDownloadInfobarEvent" expires_after="2022-06-05">
  <owner>qinmin@chromium.org</owner>
  <owner>dtrainor@chromium.org</owner>
  <summary>
    Records user interactions with the dangerous download infobar on Android.
  </summary>
</histogram>

<histogram base="true" name="Download.NetworkConnectionType.Complete"
    enum="NetworkConnectionType" expires_after="2022-09-11">
<!-- Name completed by histogram_suffixes name="DownloadSource" -->

  <owner>dtrainor@chromium.org</owner>
  <summary>Network connection type when a download is completed.</summary>
</histogram>

<histogram base="true" name="Download.NetworkConnectionType.StartNew"
    enum="NetworkConnectionType" expires_after="2023-06-04">
<!-- Name completed by histogram_suffixes name="DownloadSource" -->

  <owner>dtrainor@chromium.org</owner>
  <summary>Network connection type when starting a new download.</summary>
</histogram>

<histogram name="Download.Notification.Suppressed" enum="BooleanSuppressed"
    expires_after="2022-7-27">
  <owner>dtrainor@chromium.org</owner>
  <owner>qinmin@chromium.org</owner>
  <summary>
    Records each time a notification for a download is suppressed. Note that a
    single download can experience multiple instances of notification
    suppression during its lifetime. This histogram is only emitted for Ash
    Chrome builds.
  </summary>
</histogram>

<histogram name="Download.NotPreferredOpeningInBrowserReasons"
    enum="DownloadNotPreferredOpeningInBrowserReason"
    expires_after="2023-08-27">
  <owner>xinghuilu@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Records each time when determining whether the download should be opened in
    browser. For new download, it is logged when determining download target.
    For old download, it is logged when the download is going to open or the
    context menu is going to show. Logged at most one time for each download.
    This histogram is added for debugging purpose and will be removed
    afterwards.
  </summary>
</histogram>

<histogram name="Download.Open.ContentType" enum="DownloadContentType"
    expires_after="2023-10-08">
  <owner>drubery@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Content types of the downloads being opened. This histogram is logged
    whenever a download is opened, whether from the shelf/bubble or
    chrome://downloads. Logged on Desktop platforms.
  </summary>
</histogram>

<histogram name="Download.OpenButtonPressed.IsDownloadCompleted"
    enum="BooleanCompleted" expires_after="2023-08-27">
  <owner>xinghuilu@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Records each time a download open button is pressed, either on download
    shelf or download bubble. If the open button is pressed before the download
    is completed, the download will be auto opened when it is completed. If the
    open button is pressed when the download is already completed, the download
    will open immediately, either in browser or in system handler. The total
    count of this histogram is useful to compare whether download bubble has
    changed user behavior on clicking the open button. This histogram is added
    for debugging purpose and will be removed afterwards.
  </summary>
</histogram>

<histogram name="Download.OpenDownloads.PerProfileType"
    enum="BrowserProfileType" expires_after="2023-10-22">
  <owner>sideyilmaz@chromium.org</owner>
  <owner>chrome-incognito@google.com</owner>
  <summary>
    Records the profile type for opening the Downloads page. This may be
    triggered by different entry points like mobile menu, notification or info
    bar.
  </summary>
</histogram>

<histogram name="Download.OpenDownloadsFromMenu.PerProfileType"
    enum="BrowserProfileType" expires_after="2023-10-22">
  <owner>sideyilmaz@chromium.org</owner>
  <owner>chrome-incognito@google.com</owner>
  <summary>
    Records the profile type for opening the Downloads page from menu.
  </summary>
</histogram>

<histogram name="Download.OpenMethod" enum="DownloadOpenMethod"
    expires_after="never">
<!-- expires-never: part of top-line metric (internal: go/chrome-browser-nsm) -->

  <owner>dtrainor@chromium.org</owner>
  <owner>chrome-analysis-team@google.com</owner>
  <summary>
    Invocation count for methods of opening a download. For some file types,
    Chrome defaults to opening the file in the browser instead of invoking the
    system handler. The user has the option of overriding this behavior.

    This histogram is of special interest to the chrome-analysis-team@. Do not
    change its semantics or retire it without talking to them first.
  </summary>
</histogram>

<histogram name="Download.OverwrittenDownloadRemovedFromHistory"
    units="downloads" expires_after="2022-04-24">
  <owner>qinmin@chromium.org</owner>
  <owner>chrome-downloads@google.com</owner>
  <summary>
    Records the number of overwritten downloads that are cleaned up from
    Chrome://downloads history. Recorded after loading all the downloads from
    history DB.
  </summary>
</histogram>

<histogram name="Download.ParallelDownload.CreationFailureReason"
    enum="InterruptReason" expires_after="2021-04-25">
  <owner>qinmin@chromium.org</owner>
  <summary>
    Records the received failure reason after sending a parallel download
    request.
  </summary>
</histogram>

<histogram name="Download.ParallelDownloadRequestCount" units="requests"
    expires_after="2022-04-01">
  <owner>qinmin@chromium.org</owner>
  <summary>
    The total number of requests sent for a parallel download, including the
    initial request.
  </summary>
</histogram>

<histogram base="true" name="Download.PathGenerationEvent"
    enum="DownloadPathGenerationEvent" expires_after="never">
<!-- expires-never: Monitors download system health. -->

<!-- Name completed by histogram_suffixes name="DownloadType" -->

  <owner>qinmin@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>
    The download path generation behavior which happens before download path
    validation in download target determination process.
  </summary>
</histogram>

<histogram base="true" name="Download.PathValidationResult"
    enum="DownloadPathValidationResult" expires_after="never">
<!-- expires-never: Monitors download system health. -->

<!-- Name completed by histogram_suffixes name="DownloadType" -->

  <owner>qinmin@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>
    The download path validation result before the final download target is
    determined.
  </summary>
</histogram>

<histogram name="Download.Progress.InfoBar.CloseButtonClicked"
    enum="DownloadInfoBarState" expires_after="2022-12-18">
  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>
    Records the state of the download progress infobar on android when the user
    taps on the infobar's close button.
  </summary>
</histogram>

<histogram name="Download.Progress.InfoBar.Shown"
    enum="DownloadInfoBar.ShownState" expires_after="2023-06-25">
  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>
    Records various types of messages representing the state of the downloads as
    they are shown on the download progress infobar on android.
  </summary>
</histogram>

<histogram name="Download.QuarantineService.ConnectionError"
    enum="BooleanConnectionError" expires_after="M80">
  <owner>pmonette@chromium.org</owner>
  <owner>alewoolf@microsoft.com</owner>
  <summary>
    Whether a connection error has happened for the QuarantineService.
  </summary>
</histogram>

<histogram name="Download.ResultsRenderedTime" units="ms" expires_after="M90">
  <owner>calamity@chromium.org</owner>
  <owner>dbeam@chromium.org</owner>
  <summary>
    Records the time taken to load the downloads Web UI and render (at least) a
    screen full of items. This is roughly equivalent to 'time to first
    meaningful paint' for the downloads page.
  </summary>
</histogram>

<histogram name="Download.Retry.InterruptReason" enum="InterruptReason"
    expires_after="2023-09-03">
  <owner>thefrog@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Records the last interrupt reason for a download that has just been retried
    through the download bubble.
  </summary>
</histogram>

<histogram name="Download.SavePackage" enum="DownloadSavePackageEvent"
    expires_after="M77">
  <owner>dtrainor@chromium.org</owner>
  <summary>
    Events (e.g. Started, Cancelled, Finished, Write to Completed file, Write to
    Failed file) occuring within the state machine of a SavePackage operation.
  </summary>
</histogram>

<histogram name="Download.Service.Complete.FileSize.{DownloadClient}"
    units="KB" expires_after="never">
<!-- expires-never: Download service stability metric. -->

  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@chromium.org</owner>
  <summary>
    The file size of completed background download. Recorded when background
    downloads are finished.
  </summary>
  <token key="DownloadClient" variants="DownloadClient">
    <variant name=""/>
  </token>
</histogram>

<histogram name="Download.Service.Db.Operation.Failure"
    enum="Download.Service.ModelAction" expires_after="never">
<!-- expires-never: Monitor background download system database stability. -->

  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>Records a failed database operation.</summary>
</histogram>

<histogram name="Download.Service.Db.Operation.Success"
    enum="Download.Service.ModelAction" expires_after="never">
<!-- expires-never: Monitor background download system database stability. -->

  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>Records a successful database operation.</summary>
</histogram>

<histogram base="true" name="Download.Service.Db.Records" units="records"
    expires_after="never">
<!-- expires-never: Monitors download service system health. -->

<!-- Name completed by histogram_suffixes
     name="Download.Service.EntryState" -->

  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>
    The total number of database records used by download service, and the
    number of records in each entry state.
  </summary>
</histogram>

<histogram name="Download.Service.Driver.InterruptReason"
    enum="InterruptReason" expires_after="never">
<!-- expires-never: Monitor background download system errors. -->

  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>
    The interrupt reason for failed downloads in download service.
  </summary>
</histogram>

<histogram name="Download.Service.Entry.Event"
    enum="Download.Service.EntryEvent" expires_after="never">
<!-- expires-never: Monitors download system health. -->

  <owner>dtrainor@chromium.org</owner>
  <owner>shaktisahu@chromium.org</owner>
  <summary>
    An action the download service took on an active download. Note that this
    histogram was expired between M88 and 2023-03-03.
  </summary>
</histogram>

<histogram name="Download.Service.Entry.RetryCount" units="attempts"
    expires_after="never">
<!-- expires-never: Monitors download system health. -->

  <owner>dtrainor@chromium.org</owner>
  <owner>shaktisahu@chromium.org</owner>
  <summary>
    Records how many attempts have taken place at the time of a retry for a
    download in the Download Service. This differs from
    Download.Service.Entry.ResumptionCount, which records resumptions not
    complete restarts. Note that this histogram was expired between M88 and
    2023-03-03.
  </summary>
</histogram>

<histogram base="true" name="Download.Service.Files.CleanUp.External"
    units="files" expires_after="never">
<!-- expires-never: Monitors download service system health. -->

<!-- Name completed by histogram_suffixes
     name="Download.Service.CleanupReason" -->

  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>
    The number of files that have been deleted by external application or the
    user, when performing clean up tasks in download service.
  </summary>
</histogram>

<histogram base="true" name="Download.Service.Files.CleanUp.Failure"
    units="attempts" expires_after="never">
<!-- expires-never: Monitors download service system health. -->

<!-- Name completed by histogram_suffixes
     name="Download.Service.CleanupReason" -->

  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>
    The number of failed file deletion attempts, when performing clean up tasks
    in download service.
  </summary>
</histogram>

<histogram base="true" name="Download.Service.Files.CleanUp.Success"
    units="files" expires_after="never">
<!-- expires-never: Monitors download service system health. -->

<!-- Name completed by histogram_suffixes
     name="Download.Service.CleanupReason" -->

  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>
    The number of files successfully deleted, when performing clean up tasks in
    download service.
  </summary>
</histogram>

<histogram name="Download.Service.Files.DirCreationError"
    enum="PlatformFileError" expires_after="never">
<!-- expires-never: Download service stability metric. -->

  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>
    The error code when failed to create the download directory.
  </summary>
</histogram>

<histogram name="Download.Service.Files.LifeTime" units="ms"
    expires_after="never">
<!-- expires-never: Download service stability metric. -->

  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>
    The lifestime of a download file, which begins from the download completion
    to the file being deleted by the clean up task.
  </summary>
</histogram>

<histogram base="true" name="Download.Service.Finish.Time" units="ms"
    expires_after="M85">
<!-- Name completed by histogram_suffixes
     name="Download.Service.CompletionType" -->

  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>The time to complete the download in download service.</summary>
</histogram>

<histogram name="Download.Service.Finish.Type"
    enum="Download.Service.CompletionType" expires_after="2023-08-27">
  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>The completion type for downloads in download service.</summary>
</histogram>

<histogram name="Download.Service.OnUploadDataReceived.PauseReason"
    enum="Download.Service.PauseReason" expires_after="never">
<!-- expires-never: Used for detecting anomalies in background download service. -->

  <owner>shaktisahu@chromium.org</owner>
  <summary>
    The reason for suspending a download right after the upload data is received
    from the client. Every pause will result in two entries in the histogram:
    ANY and a more specific reason.
  </summary>
</histogram>

<histogram name="Download.Service.PauseReason"
    enum="Download.Service.PauseReason" expires_after="never">
<!-- expires-never: Used for detecting anomalies in background download service. -->

  <owner>shaktisahu@chromium.org</owner>
  <summary>
    The reason for pausing an in-progress download. Every pause will result in
    two entries in the histogram: ANY and a more specific reason.
  </summary>
</histogram>

<histogram base="true" name="Download.Service.Request.ClientAction"
    enum="Download.Service.ServiceApiAction" expires_after="never">
<!-- expires-never: Monitors download service system health. -->

<!-- Name completed by histogram_suffixes
     name="Download.Service.Client" -->

  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>Records the API calls on download service.</summary>
</histogram>

<histogram base="true" name="Download.Service.StartUpStatus"
    enum="Download.Service.StartUpResult" expires_after="never">
<!-- Name completed by histogram_suffixes
     name="Download.Service.StartUpStep" -->

<!-- expires-never: Monitors download service system health. -->

  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>The start up result of the download service.</summary>
</histogram>

<histogram base="true" name="Download.Service.TaskScheduler.Status"
    enum="Download.Service.ScheduledTaskStatus" expires_after="never">
<!-- expires-never: Monitors download service system health. -->

<!-- Name completed by histogram_suffixes
     name="Download.Service.TaskType" -->

  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>
    The platform background tasks used by download service will invoke native
    functions after being scheduled. The tasks may be aborted or canceled. This
    metric records the status of background tasks when native functions are
    invoked.
  </summary>
</histogram>

<histogram name="Download.Session.IsDownloadBubbleShowingWhenSession{Status}"
    enum="BooleanShowing" expires_after="2023-10-18">
  <owner>xinghuilu@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Records if the download bubble is showing when session {Status}. See the
    description in Session.TotalDuration for how session ends is defined. This
    histogram is added for debugging purpose and will be removed afterwards.
  </summary>
  <token key="Status">
    <variant name="Ends" summary="ends"/>
    <variant name="Starts" summary="starts"/>
  </token>
</histogram>

<histogram name="Download.Session.TotalDurationIncludingBubbleTime" units="ms"
    expires_after="2023-09-03">
  <owner>xinghuilu@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Similar to Session.TotalDuration, but add the time when the download bubble
    is showing into the total session duration. In rare cases where the user
    leaves Chrome when the bubble is showing, it may include that duration too.
    This histogram is added for debugging purpose and will be removed
    afterwards.
  </summary>
</histogram>

<histogram name="Download.SetAlwaysOpenTo" enum="BooleanEnabled"
    expires_after="2023-08-27">
  <owner>xinghuilu@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Records each time the auto open setting is changed by the user. If it is set
    to true, this type of download will be auto opened once it is completed.
    This setting is false by default. Changes on this setting are preserved
    across startup. This histogram is added for debugging purpose and will be
    removed afterwards.
  </summary>
</histogram>

<histogram name="Download.Shelf.DragEvent" enum="Download.Shelf.DragEvent"
    expires_after="M77">
  <obsolete>
    Removed 2022-06-06, though it had long expired (in M77).
  </obsolete>
  <owner>sdy@chromium.org</owner>
  <summary>
    Events related to dragging a completed download from the shelf, which
    represents dragging a reference to the downloaded file.
  </summary>
</histogram>

<histogram name="Download.Shelf.DragInfo" enum="Download.DragInfo"
    expires_after="2023-10-22">
  <owner>thefrog@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    This tracks drag events on a complete download on the shelf, and also
    general download completion on the shelf as a point of reference.
  </summary>
</histogram>

<histogram name="Download.Shelf.VisibleTime" units="ms"
    expires_after="2023-08-20">
  <owner>xinghuilu@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    The time that the download shelf was visible until it was closed. This
    histogram excludes times when DoUnhide() and DoHide() are called (i.e., when
    the full screen state changes).
  </summary>
</histogram>

<histogram name="Download.ShelfContextMenuAction"
    enum="DownloadShelfContextMenuAction" expires_after="2023-10-22">
  <owner>xinghuilu@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    This histogram is used to record the different actions and events associated
    with the download shelf context menu on Linux, MacOS, and Windows. The menu
    may also be shown on the download bubble. Specifically, it records when the
    dropdown button was clicked as well when DownloadCommands were enabled or
    executed. Each action or enable event is only emitted once; as a result, it
    is safe to compute a ratio by dividing enabled events by clicked events.
  </summary>
</histogram>

<histogram name="Download.ShowedDownloadWarning" enum="DownloadItem.DangerType"
    expires_after="2023-10-08">
  <owner>drubery@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    A download warning was shown in the shelf/bubble. Note that some downloads
    may not be shown on the shelf, e.g., if a download is not new, is transient,
    or if the shelf is disabled by an extension using the Downloads API.
    Similarly, the bubble also does not show transient downloads. Grouped by the
    type of danger. This histogram is logged on ChromeOS since M93.

    This metric is used to populate a dashboard on go/crsb-site.
  </summary>
</histogram>

<histogram name="Download.SourcesChrome" enum="ChromeDownloadSource"
    expires_after="never">
<!-- expires-never: Monitors download system health. -->

  <owner>qinmin@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>
    The initiation source (if initiated within the above-content layer of
    chrome) for a download.
  </summary>
</histogram>

<histogram name="Download.Start.ContentType" enum="DownloadContentType"
    expires_after="M110">
  <owner>shaktisahu@chromium.org</owner>
  <owner>drubery@chromium.org</owner>
  <summary>
    Content types of the downloads. This histogram is logged when a download is
    started. Logged on Desktop platforms. Warning: This histogram had expired
    from M85 to M106, data may be missing.
  </summary>
</histogram>

<histogram name="Download.Start.ContentType.NormalProfile"
    enum="DownloadContentType" expires_after="2023-10-22">
  <owner>shaktisahu@chromium.org</owner>
  <owner>clank-downloads@google.com</owner>
  <summary>
    Content types of the downloads that are started in non-incognito profile.
    This histogram is logged when a download is started. Logged on Desktop
    platforms. Warning: This histogram had expired from 2022-05-01 to
    2022-08-15, data may be missing.
  </summary>
</histogram>

<histogram name="Download.Start.PerProfileType" enum="BrowserProfileType"
    expires_after="2023-10-22">
  <owner>sideyilmaz@chromium.org</owner>
  <owner>chrome-incognito@google.com</owner>
  <summary>
    The browser profile type for each download started, recorded just after
    download successfully started.
  </summary>
</histogram>

<histogram name="Download.UserValidatedDangerousDownload"
    enum="DownloadItem.DangerType" expires_after="2023-10-08">
  <owner>drubery@chromium.org</owner>
  <owner>chrome-safebrowsing-team@chromium.org</owner>
  <summary>
    User chose to save a download which was marked dangerous. Grouped by the
    type of danger.

    This metric is used to populate a dashboard on go/crsb-site.
  </summary>
</histogram>

<histogram name="Download.VideoThumbnail.Event" enum="VideoThumbnailEvent"
    expires_after="never">
<!-- expires-never: Download media parser stability metrics. -->

  <owner>dtrainor@chromium.org</owner>
  <owner>qinmin@chromium.org</owner>
  <summary>Records events for local video thumbnail retrieval.</summary>
</histogram>

<histogram name="Download.WarningData.ActionAdded" enum="DownloadWarningAction"
    expires_after="2023-10-08">
  <owner>xinghuilu@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Records the warning action that is successfully added in warning action
    event. Logged each time an action is taken on the download warning. For the
    SHOWN action, only logged for the first time. Not logged if the action is
    not added because the first warning is missing or the events have exceeded
    the max length.
  </summary>
</histogram>

<histogram name="Download.WarningData.AddWarningActionEventOutcome"
    enum="DownloadAddWarningActionEventOutcome" expires_after="2023-09-24">
  <owner>xinghuilu@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Records whether a download warning action event was sent, or if not, then
    why not. Logged each time an action is taken on the download warning.
  </summary>
</histogram>

<histogram name="Download.WarningData.SurfaceWithoutWarningShown"
    enum="DownloadWarningSurface" expires_after="2023-10-01">
  <owner>xinghuilu@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>
    Records the warning surface that does not have a warning shown event logged
    in advance. Logged each time an action is taken on the download warning and
    there is no warning shown event logged (the NOT_ADDED_MISSING_FIRST_WARNING
    bucket in DownloadAddWarningActionEventOutcome).
  </summary>
</histogram>

<histogram name="Download.WinFileMoveError" enum="WinIFileOperationError"
    expires_after="2023-10-12">
  <owner>drubery@chromium.org</owner>
  <owner>chrome-counter-abuse-alerts@google.com</owner>
  <summary>Records the OS error code when moving a file on windows.</summary>
</histogram>

</histograms>

</histogram-configuration>