Provide a WebContents API to discover the playback of a fullscreen video.

content/renderer/media/renderer_webmediaplayer_delegate.h

 // Copyright 2015 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 CONTENT_RENDERER_MEDIA_RENDERER_WEBMEDIAPLAYER_DELEGATE_H_
 #define CONTENT_RENDERER_MEDIA_RENDERER_WEBMEDIAPLAYER_DELEGATE_H_
 
 #include <map>
 #include <memory>
 #include <set>
@@ skipping 40 matching lines @@
   void DidPlay(int player_id,
                bool has_video,
                bool has_audio,
                MediaContentType media_content_type) override;
   void DidPause(int player_id) override;
   void PlayerGone(int player_id) override;
   void SetIdle(int player_id, bool is_idle) override;
   bool IsIdle(int player_id) override;
   void ClearStaleFlag(int player_id) override;
   bool IsStale(int player_id) override;
+  void SetIsEffectivelyFullscreen(int player_id, bool is_fullscreen) override;
 
   // content::RenderFrameObserver overrides.
   void WasHidden() override;
   void WasShown() override;
   bool OnMessageReceived(const IPC::Message& msg) override;
   void OnDestruct() override;
 
   // Zeros out |idle_cleanup_interval_|, sets |idle_timeout_| to |idle_timeout|,
   // and |is_low_end_device_| to |is_low_end_device|. A zero cleanup interval
   // will cause the idle timer to run with each run of the message loop.
@@ skipping 75 matching lines @@
   // Determined at construction time based on system information; determines
   // when the idle cleanup timer should be fired more aggressively.
   bool is_low_end_device_;
 
   DISALLOW_COPY_AND_ASSIGN(RendererWebMediaPlayerDelegate);
 };
 
 }  // namespace media
 
 #endif  // CONTENT_RENDERER_MEDIA_RENDERER_WEBMEDIAPLAYER_DELEGATE_H_