Detect change on video/viewport intersection when rendered remotely

media/blink/webmediaplayer_impl.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_
 #define MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 202 matching lines @@
 
   // Called from WebMediaPlayerCast.
   // TODO(hubbe): WMPI_CAST make private.
   void OnPipelineSeeked(bool time_updated);
 
   // Restart the player/pipeline as soon as possible. This will destroy the
   // current renderer, if any, and create a new one via the RendererFactory; and
   // then seek to resume playback at the current position.
   void ScheduleRestart();
 
+  // Called when requests to activate monitoring changes on viewport
+  // intersection.
+  void ActivateViewportIntersectionMonitoring(bool activate);
+
   // Distinct states that |delegate_| can be in.
   // TODO(sandersd): This should move into WebMediaPlayerDelegate.
   // (Public for testing.)
   enum class DelegateState {
     GONE,
     PLAYING,
     PAUSED,
     ENDED,
   };
 
@@ skipping 345 matching lines @@
 
   // Whether the player is currently in autoplay muted state.
   bool autoplay_muted_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_