Add use counters for lots of DOM APIs.

third_party/WebKit/Source/core/html/HTMLVideoElement.idl

 /*
  * Copyright (C) 2007, 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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 // https://html.spec.whatwg.org/#the-video-element
 
 interface HTMLVideoElement : HTMLMediaElement {
-    [CEReactions, Reflect] attribute unsigned long width;
-    [CEReactions, Reflect] attribute unsigned long height;
-    readonly attribute unsigned long videoWidth;
-    readonly attribute unsigned long videoHeight;
-    [CEReactions, Reflect, URL] attribute DOMString poster;
+  [Measure, CEReactions, Reflect] attribute unsigned long width;
+  [Measure, CEReactions, Reflect] attribute unsigned long height;
+  [Measure] readonly attribute unsigned long videoWidth;
+   [Measure] readonly attribute unsigned long videoHeight;
+    [Measure, CEReactions, Reflect, URL] attribute DOMString poster;
 
     // Non-standard APIs
     [RuntimeEnabled=PrefixedVideoFullscreen, DeprecateAs=PrefixedVideoSupportsFullscreen] readonly attribute boolean webkitSupportsFullscreen;
     [RuntimeEnabled=PrefixedVideoFullscreen, DeprecateAs=PrefixedVideoDisplayingFullscreen] readonly attribute boolean webkitDisplayingFullscreen;
 
     [RuntimeEnabled=PrefixedVideoFullscreen, DeprecateAs=PrefixedVideoEnterFullscreen, LogActivity, LogAllWorlds] void webkitEnterFullscreen();
     [RuntimeEnabled=PrefixedVideoFullscreen, DeprecateAs=PrefixedVideoExitFullscreen] void webkitExitFullscreen();
 
     // Note the different capitalization of the "S" in FullScreen.
     [RuntimeEnabled=PrefixedVideoFullscreen, DeprecateAs=PrefixedVideoEnterFullScreen, ImplementedAs=webkitEnterFullscreen, LogActivity, LogAllWorlds] void webkitEnterFullScreen();
     [RuntimeEnabled=PrefixedVideoFullscreen, DeprecateAs=PrefixedVideoExitFullScreen, ImplementedAs=webkitExitFullscreen] void webkitExitFullScreen();
 
     // The number of frames that have been decoded and made available for
     // playback.
     [MeasureAs=PrefixedVideoDecodedFrameCount] readonly attribute unsigned long webkitDecodedFrameCount;
 
     // The number of decoded frames that have been dropped by the player
     // for performance reasons during playback.
     [MeasureAs=PrefixedVideoDroppedFrameCount] readonly attribute unsigned long webkitDroppedFrameCount;
 };