Detect change on video/viewport intersection when rendered remotely

third_party/WebKit/public/platform/WebMediaPlayerClient.h

Index: third_party/WebKit/public/platform/WebMediaPlayerClient.h
diff --git a/third_party/WebKit/public/platform/WebMediaPlayerClient.h b/third_party/WebKit/public/platform/WebMediaPlayerClient.h
index cb9807e61d05415ebb15cea35f0ac151335c4ce9..ce571b267bde27032b67012f6a92b13d2ab9ea44 100644
--- a/third_party/WebKit/public/platform/WebMediaPlayerClient.h
+++ b/third_party/WebKit/public/platform/WebMediaPlayerClient.h
@@ -95,6 +95,11 @@ class BLINK_PLATFORM_EXPORT WebMediaPlayerClient {
   virtual void cancelledRemotePlaybackRequest() = 0;
   virtual void remotePlaybackStarted() = 0;
 
+  // After the monitoring is activated, the client can inform WebMediaPlayer

[xhwang, 2016/12/15 20:31:11]

s/can/will

[xjz, 2016/12/15 20:42:37]

Done.

+  // when the element becomes/stops being the dominant visible content by
+  // calling WebMediaPlayer::becameDominantVisibleContent(bool).
+  virtual void activateViewportIntersectionMonitoring(bool) {}
+
   // Returns whether the media element is in an autoplay muted state.
   virtual bool isAutoplayingMuted() = 0;