Detect change on video/viewport intersection when rendered remotely

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

Index: third_party/WebKit/Source/core/html/HTMLMediaElement.h
diff --git a/third_party/WebKit/Source/core/html/HTMLMediaElement.h b/third_party/WebKit/Source/core/html/HTMLMediaElement.h
index 540c9271134c84ac0359ee3f709e8c55e934a562..3ca3829c8d930cbc64fae6340db6058b2f6b5661 100644
--- a/third_party/WebKit/Source/core/html/HTMLMediaElement.h
+++ b/third_party/WebKit/Source/core/html/HTMLMediaElement.h
@@ -397,12 +397,15 @@ class CORE_EXPORT HTMLMediaElement : public HTMLElement,
   WebMediaPlayer::TrackId getSelectedVideoTrackId() final;
   bool isAutoplayingMuted() final;
   void requestReload(const WebURL&) final;
+  void enableMonitorViewportIntersection(bool) final;
 
   void loadTimerFired(TimerBase*);
   void progressEventTimerFired(TimerBase*);
   void playbackProgressTimerFired(TimerBase*);
+  void checkIntersectionWhenPausedTimerFired(TimerBase*);
   void startPlaybackProgressTimer();
   void startProgressEventTimer();
+  void startCheckIntersectionWhenPausedTimer();
   void stopPeriodicTimers();
 
   void seek(double time);
@@ -549,6 +552,7 @@ class CORE_EXPORT HTMLMediaElement : public HTMLElement,
   UnthrottledThreadTimer<HTMLMediaElement> m_playbackProgressTimer;
   UnthrottledThreadTimer<HTMLMediaElement> m_audioTracksTimer;
   UnthrottledThreadTimer<HTMLMediaElement> m_viewportFillDebouncerTimer;
+  UnthrottledThreadTimer<HTMLMediaElement> m_checkIntersectionWhenPausedTimer;
   Member<TimeRanges> m_playedTimeRanges;
   Member<GenericEventQueue> m_asyncEventQueue;
 
@@ -734,6 +738,8 @@ class CORE_EXPORT HTMLMediaElement : public HTMLElement,
 
   IntRect m_currentIntersectRect;
 
+  bool m_enableMonitorViewportIntersection = false;
+
   static URLRegistry* s_mediaStreamRegistry;
 };