third_party/perfetto/protos/perfetto/trace/track_event/chrome_compositor_scheduler_state.proto - cobalt - Git at Google

 /*
  * Copyright (C) 2019 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 syntax = "proto2";

 import "protos/perfetto/trace/track_event/source_location.proto";

 package perfetto.protos;

 // Describes Chrome's Compositor scheduler's current state and associated
 // variables.
 //
 // These protos and enums were adapted from the corresponding original JSON
 // trace event for the scheduler state. In contrast to the JSON, we use strongly
 // typed enum values instead of strings for many fields, and
 // microsecond-granularity timestamps.
 //
 // The original format was generated in JSON by the code at
 // https://cs.chromium.org/chromium/src/cc/scheduler/scheduler.cc?l=870&rcl=5e15eabc9c0eec8daf94fdf78e93f13b6e3b63dd
 //
 // And is now generated as protozero:
 // https://cs.chromium.org/chromium/src/cc/scheduler/scheduler.cc?q=Scheduler::AsPro
 //
 // All non-delta-timestamps are absolute CLOCK_MONOTONIC timestamps.

 enum ChromeCompositorSchedulerAction {
   CC_SCHEDULER_ACTION_UNSPECIFIED = 0;
   CC_SCHEDULER_ACTION_NONE = 1;
   CC_SCHEDULER_ACTION_SEND_BEGIN_MAIN_FRAME = 2;
   CC_SCHEDULER_ACTION_COMMIT = 3;
   CC_SCHEDULER_ACTION_ACTIVATE_SYNC_TREE = 4;
   CC_SCHEDULER_ACTION_DRAW_IF_POSSIBLE = 5;
   CC_SCHEDULER_ACTION_DRAW_FORCED = 6;
   CC_SCHEDULER_ACTION_DRAW_ABORT = 7;
   CC_SCHEDULER_ACTION_BEGIN_LAYER_TREE_FRAME_SINK_CREATION = 8;
   CC_SCHEDULER_ACTION_PREPARE_TILES = 9;
   CC_SCHEDULER_ACTION_INVALIDATE_LAYER_TREE_FRAME_SINK = 10;
   CC_SCHEDULER_ACTION_PERFORM_IMPL_SIDE_INVALIDATION = 11;
   CC_SCHEDULER_ACTION_NOTIFY_BEGIN_MAIN_FRAME_NOT_EXPECTED_UNTIL = 12;
   CC_SCHEDULER_ACTION_NOTIFY_BEGIN_MAIN_FRAME_NOT_EXPECTED_SOON = 13;
 }

 // Next id: 18
 message ChromeCompositorSchedulerState {
   enum BeginImplFrameDeadlineMode {
     DEADLINE_MODE_UNSPECIFIED = 0;
     DEADLINE_MODE_NONE = 1;
     DEADLINE_MODE_IMMEDIATE = 2;
     DEADLINE_MODE_REGULAR = 3;
     DEADLINE_MODE_LATE = 4;
     DEADLINE_MODE_BLOCKED = 5;
   }
   optional ChromeCompositorStateMachine state_machine = 1;
   optional bool observing_begin_frame_source = 2;
   optional bool begin_impl_frame_deadline_task = 3;
   optional bool pending_begin_frame_task = 4;
   optional bool skipped_last_frame_missed_exceeded_deadline = 5;
   optional ChromeCompositorSchedulerAction inside_action = 7;
   optional BeginImplFrameDeadlineMode deadline_mode = 8;
   optional int64 deadline_us = 9;
   optional int64 deadline_scheduled_at_us = 10;
   optional int64 now_us = 11;
   optional int64 now_to_deadline_delta_us = 12;
   optional int64 now_to_deadline_scheduled_at_delta_us = 13;
   optional BeginImplFrameArgs begin_impl_frame_args = 14;
   optional BeginFrameObserverState begin_frame_observer_state = 15;
   optional BeginFrameSourceState begin_frame_source_state = 16;
   optional CompositorTimingHistory compositor_timing_history = 17;

   reserved 6;
 }

 // Describes the current values stored in the Chrome Compositor state machine.
 // Next id: 3
 message ChromeCompositorStateMachine {
   // Next id: 6
   message MajorState {
     enum BeginImplFrameState {
       BEGIN_IMPL_FRAME_UNSPECIFIED = 0;
       BEGIN_IMPL_FRAME_IDLE = 1;
       BEGIN_IMPL_FRAME_INSIDE_BEGIN_FRAME = 2;
       BEGIN_IMPL_FRAME_INSIDE_DEADLINE = 3;
     }
     enum BeginMainFrameState {
       BEGIN_MAIN_FRAME_UNSPECIFIED = 0;
       BEGIN_MAIN_FRAME_IDLE = 1;
       BEGIN_MAIN_FRAME_SENT = 2;
       BEGIN_MAIN_FRAME_READY_TO_COMMIT = 3;
     }
     enum LayerTreeFrameSinkState {
       LAYER_TREE_FRAME_UNSPECIFIED = 0;
       LAYER_TREE_FRAME_NONE = 1;
       LAYER_TREE_FRAME_ACTIVE = 2;
       LAYER_TREE_FRAME_CREATING = 3;
       LAYER_TREE_FRAME_WAITING_FOR_FIRST_COMMIT = 4;
       LAYER_TREE_FRAME_WAITING_FOR_FIRST_ACTIVATION = 5;
     }
     enum ForcedRedrawOnTimeoutState {
       FORCED_REDRAW_UNSPECIFIED = 0;
       FORCED_REDRAW_IDLE = 1;
       FORCED_REDRAW_WAITING_FOR_COMMIT = 2;
       FORCED_REDRAW_WAITING_FOR_ACTIVATION = 3;
       FORCED_REDRAW_WAITING_FOR_DRAW = 4;
     }
     optional ChromeCompositorSchedulerAction next_action = 1;
     optional BeginImplFrameState begin_impl_frame_state = 2;
     optional BeginMainFrameState begin_main_frame_state = 3;
     optional LayerTreeFrameSinkState layer_tree_frame_sink_state = 4;
     optional ForcedRedrawOnTimeoutState forced_redraw_state = 5;
   }
   optional MajorState major_state = 1;

   // Next id: 47
   message MinorState {
     enum TreePriority {
       TREE_PRIORITY_UNSPECIFIED = 0;
       TREE_PRIORITY_SAME_PRIORITY_FOR_BOTH_TREES = 1;
       TREE_PRIORITY_SMOOTHNESS_TAKES_PRIORITY = 2;
       TREE_PRIORITY_NEW_CONTENT_TAKES_PRIORITY = 3;
     }
     enum ScrollHandlerState {
       SCROLL_HANDLER_UNSPECIFIED = 0;
       SCROLL_AFFECTS_SCROLL_HANDLER = 1;
       SCROLL_DOES_NOT_AFFECT_SCROLL_HANDLER = 2;
     }
     optional int32 commit_count = 1;
     optional int32 current_frame_number = 2;
     optional int32 last_frame_number_submit_performed = 3;
     optional int32 last_frame_number_draw_performed = 4;
     optional int32 last_frame_number_begin_main_frame_sent = 5;
     optional bool did_draw = 6;
     optional bool did_send_begin_main_frame_for_current_frame = 7;
     optional bool did_notify_begin_main_frame_not_expected_until = 8;
     optional bool did_notify_begin_main_frame_not_expected_soon = 9;
     optional bool wants_begin_main_frame_not_expected = 10;
     optional bool did_commit_during_frame = 11;
     optional bool did_invalidate_layer_tree_frame_sink = 12;
     optional bool did_perform_impl_side_invalidaion = 13;
     optional bool did_prepare_tiles = 14;
     optional int32 consecutive_checkerboard_animations = 15;
     optional int32 pending_submit_frames = 16;
     optional int32 submit_frames_with_current_layer_tree_frame_sink = 17;
     optional bool needs_redraw = 18;
     optional bool needs_prepare_tiles = 19;
     optional bool needs_begin_main_frame = 20;
     optional bool needs_one_begin_impl_frame = 21;
     optional bool visible = 22;
     optional bool begin_frame_source_paused = 23;
     optional bool can_draw = 24;
     optional bool resourceless_draw = 25;
     optional bool has_pending_tree = 26;
     optional bool pending_tree_is_ready_for_activation = 27;
     optional bool active_tree_needs_first_draw = 28;
     optional bool active_tree_is_ready_to_draw = 29;
     optional bool did_create_and_initialize_first_layer_tree_frame_sink = 30;
     optional TreePriority tree_priority = 31;
     optional ScrollHandlerState scroll_handler_state = 32;
     optional bool critical_begin_main_frame_to_activate_is_fast = 33;
     optional bool main_thread_missed_last_deadline = 34;
     optional bool video_needs_begin_frames = 36;
     optional bool defer_begin_main_frame = 37;
     optional bool last_commit_had_no_updates = 38;
     optional bool did_draw_in_last_frame = 39;
     optional bool did_submit_in_last_frame = 40;
     optional bool needs_impl_side_invalidation = 41;
     optional bool current_pending_tree_is_impl_side = 42;
     optional bool previous_pending_tree_was_impl_side = 43;
     optional bool processing_animation_worklets_for_active_tree = 44;
     optional bool processing_animation_worklets_for_pending_tree = 45;
     optional bool processing_paint_worklets_for_pending_tree = 46;

     reserved 35;
   }
   optional MinorState minor_state = 2;
 }

 // Next id: 13
 message BeginFrameArgs {
   // JSON format has a "type" field that was always just "BeginFrameArgs" we
   // drop this in the proto representation, and instead make the JSON format
   // "subtype" field become the type field.
   enum BeginFrameArgsType {
     BEGIN_FRAME_ARGS_TYPE_UNSPECIFIED = 0;
     BEGIN_FRAME_ARGS_TYPE_INVALID = 1;
     BEGIN_FRAME_ARGS_TYPE_NORMAL = 2;
     BEGIN_FRAME_ARGS_TYPE_MISSED = 3;
   }
   optional BeginFrameArgsType type = 1;
   optional uint64 source_id = 2;
   optional uint64 sequence_number = 3;
   optional int64 frame_time_us = 4;
   optional int64 deadline_us = 5;
   optional int64 interval_delta_us = 6;
   optional bool on_critical_path = 7;
   optional bool animate_only = 8;
   oneof created_from {
     // The interned SourceLocation.
     uint64 source_location_iid = 9;
     // The SourceLocation that this args was created from.
     // TODO(nuskos): Eventually we will support interning inside of
     // TypedArgument TraceEvents and then we shouldn't need this SourceLocation
     // since we can emit it as part of the InternedData message. When we can
     // remove this |source_location|.
     SourceLocation source_location = 10;
   }
   optional int64 frames_throttled_since_last = 12;
 }

 // Next id: 7
 message BeginImplFrameArgs {
   optional int64 updated_at_us = 1;
   optional int64 finished_at_us = 2;
   enum State {
     BEGIN_FRAME_FINISHED = 0;
     BEGIN_FRAME_USING = 1;
   }
   optional State state = 3;
   oneof args {
     // Only set if |state| is BEGIN_FRAME_FINISHED.
     BeginFrameArgs current_args = 4;
     // Only set if |state| is BEGIN_FRAME_USING.
     BeginFrameArgs last_args = 5;
   }
   message TimestampsInUs {
     optional int64 interval_delta = 1;
     optional int64 now_to_deadline_delta = 2;
     optional int64 frame_time_to_now_delta = 3;
     optional int64 frame_time_to_deadline_delta = 4;
     optional int64 now = 5;
     optional int64 frame_time = 6;
     optional int64 deadline = 7;
   }
   optional TimestampsInUs timestamps_in_us = 6;
 }

 message BeginFrameObserverState {
   optional int64 dropped_begin_frame_args = 1;
   optional BeginFrameArgs last_begin_frame_args = 2;
 }

 message BeginFrameSourceState {
   optional uint32 source_id = 1;
   optional bool paused = 2;
   optional uint32 num_observers = 3;
   optional BeginFrameArgs last_begin_frame_args = 4;
 }

 message CompositorTimingHistory {
   optional int64 begin_main_frame_queue_critical_estimate_delta_us = 1;
   optional int64 begin_main_frame_queue_not_critical_estimate_delta_us = 2;
   optional int64 begin_main_frame_start_to_ready_to_commit_estimate_delta_us =
       3;
   optional int64 commit_to_ready_to_activate_estimate_delta_us = 4;
   optional int64 prepare_tiles_estimate_delta_us = 5;
   optional int64 activate_estimate_delta_us = 6;
   optional int64 draw_estimate_delta_us = 7;
 }
	/*
	* Copyright (C) 2019 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	syntax = "proto2";

	import "protos/perfetto/trace/track_event/source_location.proto";

	package perfetto.protos;

	// Describes Chrome's Compositor scheduler's current state and associated
	// variables.
	//
	// These protos and enums were adapted from the corresponding original JSON
	// trace event for the scheduler state. In contrast to the JSON, we use strongly
	// typed enum values instead of strings for many fields, and
	// microsecond-granularity timestamps.
	//
	// The original format was generated in JSON by the code at
	// https://cs.chromium.org/chromium/src/cc/scheduler/scheduler.cc?l=870&rcl=5e15eabc9c0eec8daf94fdf78e93f13b6e3b63dd
	//
	// And is now generated as protozero:
	// https://cs.chromium.org/chromium/src/cc/scheduler/scheduler.cc?q=Scheduler::AsPro
	//
	// All non-delta-timestamps are absolute CLOCK_MONOTONIC timestamps.

	enum ChromeCompositorSchedulerAction {
	CC_SCHEDULER_ACTION_UNSPECIFIED = 0;
	CC_SCHEDULER_ACTION_NONE = 1;
	CC_SCHEDULER_ACTION_SEND_BEGIN_MAIN_FRAME = 2;
	CC_SCHEDULER_ACTION_COMMIT = 3;
	CC_SCHEDULER_ACTION_ACTIVATE_SYNC_TREE = 4;
	CC_SCHEDULER_ACTION_DRAW_IF_POSSIBLE = 5;
	CC_SCHEDULER_ACTION_DRAW_FORCED = 6;
	CC_SCHEDULER_ACTION_DRAW_ABORT = 7;
	CC_SCHEDULER_ACTION_BEGIN_LAYER_TREE_FRAME_SINK_CREATION = 8;
	CC_SCHEDULER_ACTION_PREPARE_TILES = 9;
	CC_SCHEDULER_ACTION_INVALIDATE_LAYER_TREE_FRAME_SINK = 10;
	CC_SCHEDULER_ACTION_PERFORM_IMPL_SIDE_INVALIDATION = 11;
	CC_SCHEDULER_ACTION_NOTIFY_BEGIN_MAIN_FRAME_NOT_EXPECTED_UNTIL = 12;
	CC_SCHEDULER_ACTION_NOTIFY_BEGIN_MAIN_FRAME_NOT_EXPECTED_SOON = 13;
	}

	// Next id: 18
	message ChromeCompositorSchedulerState {
	enum BeginImplFrameDeadlineMode {
	DEADLINE_MODE_UNSPECIFIED = 0;
	DEADLINE_MODE_NONE = 1;
	DEADLINE_MODE_IMMEDIATE = 2;
	DEADLINE_MODE_REGULAR = 3;
	DEADLINE_MODE_LATE = 4;
	DEADLINE_MODE_BLOCKED = 5;
	}
	optional ChromeCompositorStateMachine state_machine = 1;
	optional bool observing_begin_frame_source = 2;
	optional bool begin_impl_frame_deadline_task = 3;
	optional bool pending_begin_frame_task = 4;
	optional bool skipped_last_frame_missed_exceeded_deadline = 5;
	optional ChromeCompositorSchedulerAction inside_action = 7;
	optional BeginImplFrameDeadlineMode deadline_mode = 8;
	optional int64 deadline_us = 9;
	optional int64 deadline_scheduled_at_us = 10;
	optional int64 now_us = 11;
	optional int64 now_to_deadline_delta_us = 12;
	optional int64 now_to_deadline_scheduled_at_delta_us = 13;
	optional BeginImplFrameArgs begin_impl_frame_args = 14;
	optional BeginFrameObserverState begin_frame_observer_state = 15;
	optional BeginFrameSourceState begin_frame_source_state = 16;
	optional CompositorTimingHistory compositor_timing_history = 17;

	reserved 6;
	}

	// Describes the current values stored in the Chrome Compositor state machine.
	// Next id: 3
	message ChromeCompositorStateMachine {
	// Next id: 6
	message MajorState {
	enum BeginImplFrameState {
	BEGIN_IMPL_FRAME_UNSPECIFIED = 0;
	BEGIN_IMPL_FRAME_IDLE = 1;
	BEGIN_IMPL_FRAME_INSIDE_BEGIN_FRAME = 2;
	BEGIN_IMPL_FRAME_INSIDE_DEADLINE = 3;
	}
	enum BeginMainFrameState {
	BEGIN_MAIN_FRAME_UNSPECIFIED = 0;
	BEGIN_MAIN_FRAME_IDLE = 1;
	BEGIN_MAIN_FRAME_SENT = 2;
	BEGIN_MAIN_FRAME_READY_TO_COMMIT = 3;
	}
	enum LayerTreeFrameSinkState {
	LAYER_TREE_FRAME_UNSPECIFIED = 0;
	LAYER_TREE_FRAME_NONE = 1;
	LAYER_TREE_FRAME_ACTIVE = 2;
	LAYER_TREE_FRAME_CREATING = 3;
	LAYER_TREE_FRAME_WAITING_FOR_FIRST_COMMIT = 4;
	LAYER_TREE_FRAME_WAITING_FOR_FIRST_ACTIVATION = 5;
	}
	enum ForcedRedrawOnTimeoutState {
	FORCED_REDRAW_UNSPECIFIED = 0;
	FORCED_REDRAW_IDLE = 1;
	FORCED_REDRAW_WAITING_FOR_COMMIT = 2;
	FORCED_REDRAW_WAITING_FOR_ACTIVATION = 3;
	FORCED_REDRAW_WAITING_FOR_DRAW = 4;
	}
	optional ChromeCompositorSchedulerAction next_action = 1;
	optional BeginImplFrameState begin_impl_frame_state = 2;
	optional BeginMainFrameState begin_main_frame_state = 3;
	optional LayerTreeFrameSinkState layer_tree_frame_sink_state = 4;
	optional ForcedRedrawOnTimeoutState forced_redraw_state = 5;
	}
	optional MajorState major_state = 1;

	// Next id: 47
	message MinorState {
	enum TreePriority {
	TREE_PRIORITY_UNSPECIFIED = 0;
	TREE_PRIORITY_SAME_PRIORITY_FOR_BOTH_TREES = 1;
	TREE_PRIORITY_SMOOTHNESS_TAKES_PRIORITY = 2;
	TREE_PRIORITY_NEW_CONTENT_TAKES_PRIORITY = 3;
	}
	enum ScrollHandlerState {
	SCROLL_HANDLER_UNSPECIFIED = 0;
	SCROLL_AFFECTS_SCROLL_HANDLER = 1;
	SCROLL_DOES_NOT_AFFECT_SCROLL_HANDLER = 2;
	}
	optional int32 commit_count = 1;
	optional int32 current_frame_number = 2;
	optional int32 last_frame_number_submit_performed = 3;
	optional int32 last_frame_number_draw_performed = 4;
	optional int32 last_frame_number_begin_main_frame_sent = 5;
	optional bool did_draw = 6;
	optional bool did_send_begin_main_frame_for_current_frame = 7;
	optional bool did_notify_begin_main_frame_not_expected_until = 8;
	optional bool did_notify_begin_main_frame_not_expected_soon = 9;
	optional bool wants_begin_main_frame_not_expected = 10;
	optional bool did_commit_during_frame = 11;
	optional bool did_invalidate_layer_tree_frame_sink = 12;
	optional bool did_perform_impl_side_invalidaion = 13;
	optional bool did_prepare_tiles = 14;
	optional int32 consecutive_checkerboard_animations = 15;
	optional int32 pending_submit_frames = 16;
	optional int32 submit_frames_with_current_layer_tree_frame_sink = 17;
	optional bool needs_redraw = 18;
	optional bool needs_prepare_tiles = 19;
	optional bool needs_begin_main_frame = 20;
	optional bool needs_one_begin_impl_frame = 21;
	optional bool visible = 22;
	optional bool begin_frame_source_paused = 23;
	optional bool can_draw = 24;
	optional bool resourceless_draw = 25;
	optional bool has_pending_tree = 26;
	optional bool pending_tree_is_ready_for_activation = 27;
	optional bool active_tree_needs_first_draw = 28;
	optional bool active_tree_is_ready_to_draw = 29;
	optional bool did_create_and_initialize_first_layer_tree_frame_sink = 30;
	optional TreePriority tree_priority = 31;
	optional ScrollHandlerState scroll_handler_state = 32;
	optional bool critical_begin_main_frame_to_activate_is_fast = 33;
	optional bool main_thread_missed_last_deadline = 34;
	optional bool video_needs_begin_frames = 36;
	optional bool defer_begin_main_frame = 37;
	optional bool last_commit_had_no_updates = 38;
	optional bool did_draw_in_last_frame = 39;
	optional bool did_submit_in_last_frame = 40;
	optional bool needs_impl_side_invalidation = 41;
	optional bool current_pending_tree_is_impl_side = 42;
	optional bool previous_pending_tree_was_impl_side = 43;
	optional bool processing_animation_worklets_for_active_tree = 44;
	optional bool processing_animation_worklets_for_pending_tree = 45;
	optional bool processing_paint_worklets_for_pending_tree = 46;

	reserved 35;
	}
	optional MinorState minor_state = 2;
	}

	// Next id: 13
	message BeginFrameArgs {
	// JSON format has a "type" field that was always just "BeginFrameArgs" we
	// drop this in the proto representation, and instead make the JSON format
	// "subtype" field become the type field.
	enum BeginFrameArgsType {
	BEGIN_FRAME_ARGS_TYPE_UNSPECIFIED = 0;
	BEGIN_FRAME_ARGS_TYPE_INVALID = 1;
	BEGIN_FRAME_ARGS_TYPE_NORMAL = 2;
	BEGIN_FRAME_ARGS_TYPE_MISSED = 3;
	}
	optional BeginFrameArgsType type = 1;
	optional uint64 source_id = 2;
	optional uint64 sequence_number = 3;
	optional int64 frame_time_us = 4;
	optional int64 deadline_us = 5;
	optional int64 interval_delta_us = 6;
	optional bool on_critical_path = 7;
	optional bool animate_only = 8;
	oneof created_from {
	// The interned SourceLocation.
	uint64 source_location_iid = 9;
	// The SourceLocation that this args was created from.
	// TODO(nuskos): Eventually we will support interning inside of
	// TypedArgument TraceEvents and then we shouldn't need this SourceLocation
	// since we can emit it as part of the InternedData message. When we can
	// remove this \|source_location\|.
	SourceLocation source_location = 10;
	}
	optional int64 frames_throttled_since_last = 12;
	}

	// Next id: 7
	message BeginImplFrameArgs {
	optional int64 updated_at_us = 1;
	optional int64 finished_at_us = 2;
	enum State {
	BEGIN_FRAME_FINISHED = 0;
	BEGIN_FRAME_USING = 1;
	}
	optional State state = 3;
	oneof args {
	// Only set if \|state\| is BEGIN_FRAME_FINISHED.
	BeginFrameArgs current_args = 4;
	// Only set if \|state\| is BEGIN_FRAME_USING.
	BeginFrameArgs last_args = 5;
	}
	message TimestampsInUs {
	optional int64 interval_delta = 1;
	optional int64 now_to_deadline_delta = 2;
	optional int64 frame_time_to_now_delta = 3;
	optional int64 frame_time_to_deadline_delta = 4;
	optional int64 now = 5;
	optional int64 frame_time = 6;
	optional int64 deadline = 7;
	}
	optional TimestampsInUs timestamps_in_us = 6;
	}

	message BeginFrameObserverState {
	optional int64 dropped_begin_frame_args = 1;
	optional BeginFrameArgs last_begin_frame_args = 2;
	}

	message BeginFrameSourceState {
	optional uint32 source_id = 1;
	optional bool paused = 2;
	optional uint32 num_observers = 3;
	optional BeginFrameArgs last_begin_frame_args = 4;
	}

	message CompositorTimingHistory {
	optional int64 begin_main_frame_queue_critical_estimate_delta_us = 1;
	optional int64 begin_main_frame_queue_not_critical_estimate_delta_us = 2;
	optional int64 begin_main_frame_start_to_ready_to_commit_estimate_delta_us =
	3;
	optional int64 commit_to_ready_to_activate_estimate_delta_us = 4;
	optional int64 prepare_tiles_estimate_delta_us = 5;
	optional int64 activate_estimate_delta_us = 6;
	optional int64 draw_estimate_delta_us = 7;
	}