Implement MediaSession on top of the WebMediaPlayerDelegate.

chrome/browser/media/android/remote/remote_media_player_manager.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 CHROME_BROWSER_MEDIA_ANDROID_REMOTE_REMOTE_MEDIA_PLAYER_MANAGER_H_
 #define CHROME_BROWSER_MEDIA_ANDROID_REMOTE_REMOTE_MEDIA_PLAYER_MANAGER_H_
 
 #include <set>
 #include <vector>
 
@@ skipping 36 matching lines @@
 
   // Swap which player is currently in use (local or remote).
   void SwitchToRemotePlayer(int player_id, const std::string& casting_message);
   void SwitchToLocalPlayer(int player_id);
 
  protected:
   void OnSetPoster(int player_id, const GURL& url) override;
 
   void ReleaseResources(int player_id) override;
 
+  bool IsPlayingRemotely(int player_id) override;
+
  private:
   // Returns a MediaPlayerAndroid implementation for playing the media remotely.
   RemoteMediaPlayerBridge* CreateRemoteMediaPlayer(
       media::MediaPlayerAndroid* local_player);
 
   // Replaces the remote player with the local player this class is holding.
   // Does nothing if there is no remote player.
   void ReplaceRemotePlayerWithLocal(int player_id);
 
   // content::BrowserMediaPlayerManager overrides.
   void OnStart(int player_id) override;
   void OnInitialize(
       const MediaPlayerHostMsg_Initialize_Params& media_player_params) override;
   void OnDestroyPlayer(int player_id) override;
   void OnSuspendAndReleaseResources(int player_id) override;
-  void OnSuspend(int player_id) override;
-  void OnResume(int player_id) override;
   void OnRequestRemotePlayback(int player_id) override;
   void OnRequestRemotePlaybackControl(int player_id) override;
 
   void ReleaseFullscreenPlayer(media::MediaPlayerAndroid* player) override;
 
   // Callback for when the download of poster image is done.
   void DidDownloadPoster(
       int player_id,
       int id,
       int http_status_code,
@@ skipping 17 matching lines @@
   // playing locally.
   media::MediaPlayerAndroid* GetLocalPlayer(int player_id);
 
   void SwapCurrentPlayer(int player_id);
 
   // Contains the alternative players that are not currently in use, i.e. the
   // remote players for videos that are playing locally, and the local players
   // for videos that are playing remotely.
   ScopedVector<media::MediaPlayerAndroid> alternative_players_;
 
-  bool IsPlayingRemotely(int player_id);
-
   std::set<int> players_playing_remotely_;
 
   base::WeakPtrFactory<RemoteMediaPlayerManager> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RemoteMediaPlayerManager);
 };
 
 } // namespace remote_media
 
 #endif  // CHROME_BROWSER_MEDIA_ANDROID_REMOTE_REMOTE_MEDIA_PLAYER_MANAGER_H_