Import Cobalt 19.master.0.203780

Includes the following patches:
  https://cobalt-review.googlesource.com/c/cobalt/+/5210
    by errong.leng@samsung.com
  https://cobalt-review.googlesource.com/c/cobalt/+/5270
    by linus.wang@samsung.com
diff --git a/src/third_party/web_platform_tests/XMLHttpRequest/xmlhttprequest-timeout-overrides.html b/src/third_party/web_platform_tests/XMLHttpRequest/xmlhttprequest-timeout-overrides.html
new file mode 100644
index 0000000..6366e31
--- /dev/null
+++ b/src/third_party/web_platform_tests/XMLHttpRequest/xmlhttprequest-timeout-overrides.html
@@ -0,0 +1,24 @@
+ <!DOCTYPE html>
+<html>
+<head>
+    <meta charset="utf-8" />
+    <title>XHR2 Timeout Property Tests</title>
+    <link rel="help" href="https://xhr.spec.whatwg.org/#the-timeout-attribute" data-tested-assertations="following::ol[1]/li[2]" />
+    <link rel="help" href="https://xhr.spec.whatwg.org/#handler-xhr-ontimeout" data-tested-assertations="../.."/>
+    <link rel="help" href="https://xhr.spec.whatwg.org/#timeout-error" data-tested-assertations=".."/>
+    <link rel="help" href="https://xhr.spec.whatwg.org/#request-error" data-tested-assertations="following::ol[1]/li[9]"/>
+    <link rel="stylesheet" href="/resources/testharness.css" />
+    <meta name=timeout content=long>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="resources/xmlhttprequest-timeout.js"></script>
+    <script src="resources/xmlhttprequest-timeout-runner.js"></script>
+</head>
+<body>
+    <h1>Description</h1>
+    <p>This test validates that the XHR2 timeout property behaves as expected in async cases in document (i.e. non-worker) context.</p>
+    <div id="log"></div>
+    <script src="resources/xmlhttprequest-timeout-overrides.js"></script>
+</body>
+</html>
+