Measure whether muted videos that started playing with play() become visible at some point

third_party/WebKit/Source/core/html/HTMLMediaElement.h

 /*
  * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013 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
@@ skipping 26 matching lines @@
 #include "core/html/track/TextTrack.h"
 #include "platform/Supplementable.h"
 #include "platform/audio/AudioSourceProvider.h"
 #include "public/platform/WebAudioSourceProviderClient.h"
 #include "public/platform/WebMediaPlayerClient.h"
 #include "public/platform/WebMimeRegistry.h"
 #include <memory>
 
 namespace blink {
 
+enum class AutoplaySource;

[mlamouri (slow - plz ping), 2016/07/07 10:17:53]

I don't think you need this

[Zhiqiang Zhang (Slow), 2016/07/07 11:01:10]

Done.

+
 class AudioSourceProviderClient;
 class AudioTrackList;
+class AutoplayUmaHelper;
 class ContentType;
 class CueTimeline;
 class ElementVisibilityObserver;
 class EnumerationHistogram;
 class Event;
 class ExceptionState;
 class HTMLSourceElement;
 class HTMLTrackElement;
 class KURL;
 class MediaControls;
@@ skipping 232 matching lines @@
     void didMoveToNewDocument(Document& oldDocument) override;
     virtual KURL posterImageURL() const { return KURL(); }
 
     enum DisplayMode { Unknown, Poster, Video };
     DisplayMode getDisplayMode() const { return m_displayMode; }
     virtual void setDisplayMode(DisplayMode mode) { m_displayMode = mode; }
 
     void recordAutoplayMetric(AutoplayMetrics);
 
 private:
-    // These values are used for histograms. Do not reorder.
-    enum AutoplayUnmuteActionStatus {
-        AutoplayUnmuteActionFailure = 0,
-        AutoplayUnmuteActionSuccess = 1,
-        AutoplayUnmuteActionMax
-    };
-
     void resetMediaPlayerAndMediaSource();
 
     bool alwaysCreateUserAgentShadowRoot() const final { return true; }
     bool areAuthorShadowsAllowed() const final { return false; }
 
     bool supportsFocus() const final;
     bool isMouseFocusable() const final;
     bool layoutObjectIsNeeded(const ComputedStyle&) override;
     LayoutObject* createLayoutObject(const ComputedStyle&) override;
     InsertionNotificationRequest insertedInto(ContainerNode*) final;
@@ skipping 174 matching lines @@
     void scheduleResolvePlayPromises();
     void scheduleRejectPlayPromises(ExceptionCode);
     void scheduleNotifyPlaying();
     void resolveScheduledPlayPromises();
     void rejectScheduledPlayPromises();
     void rejectPlayPromises(ExceptionCode, const String&);
     void rejectPlayPromisesInternal(ExceptionCode, const String&);
 
     EnumerationHistogram& showControlsHistogram() const;
 
-    void recordAutoplaySourceMetric(int source);
-    void recordAutoplayUnmuteStatus(AutoplayUnmuteActionStatus);
-
     void onVisibilityChangedForAutoplay(bool isVisible);
 
     UnthrottledTimer<HTMLMediaElement> m_loadTimer;
     UnthrottledTimer<HTMLMediaElement> m_progressEventTimer;
     UnthrottledTimer<HTMLMediaElement> m_playbackProgressTimer;
     UnthrottledTimer<HTMLMediaElement> m_audioTracksTimer;
     Member<TimeRanges> m_playedTimeRanges;
     Member<GenericEventQueue> m_asyncEventQueue;
 
     double m_playbackRate;
@@ skipping 156 matching lines @@
 
     class AutoplayHelperClientImpl;
 
     friend class Internals;
     friend class TrackDisplayUpdateScope;
     friend class AutoplayExperimentHelper;
     friend class MediaControlsTest;
 
     Member<AutoplayExperimentHelper::Client> m_autoplayHelperClient;
     Member<AutoplayExperimentHelper> m_autoplayHelper;
+    Member<AutoplayUmaHelper> m_autoplayUmaHelper;
 
     WebRemotePlaybackClient* m_remotePlaybackClient;
 
     // class AutoplayVisibilityObserver;
     Member<ElementVisibilityObserver> m_autoplayVisibilityObserver;
 
     static URLRegistry* s_mediaStreamRegistry;
 };
 
 inline bool isHTMLMediaElement(const HTMLElement& element)
 {
     return isHTMLAudioElement(element) || isHTMLVideoElement(element);
 }
 
 DEFINE_HTMLELEMENT_TYPE_CASTS_WITH_FUNCTION(HTMLMediaElement);
 
 } // namespace blink
 
 #endif // HTMLMediaElement_h