Implement MediaSession on top of the WebMediaPlayerDelegate.

chrome/browser/media/android/remote/remote_media_player_manager.cc

 // 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.
 
 #include "chrome/browser/media/android/remote/remote_media_player_manager.h"
 
 #include "chrome/browser/android/tab_android.h"
 #include "chrome/common/chrome_content_client.h"
 #include "content/common/media/media_player_messages_android.h"
 #include "third_party/skia/include/core/SkBitmap.h"
@@ skipping 117 matching lines @@
   RemoteMediaPlayerBridge* player = new RemoteMediaPlayerBridge(
       local_player,
       GetUserAgent(),
       false,
       this);
   alternative_players_.push_back(player);
   player->Initialize();
   return player;
 }
 
-// OnSuspend and OnResume are called when the local player loses or gains
-// audio focus. If we are playing remotely then ignore these.
-void RemoteMediaPlayerManager::OnSuspend(int player_id) {
-  if (!IsPlayingRemotely(player_id))
-    BrowserMediaPlayerManager::OnSuspend(player_id);
-}
-
-void RemoteMediaPlayerManager::OnResume(int player_id) {
-  if (!IsPlayingRemotely(player_id))
-    BrowserMediaPlayerManager::OnResume(player_id);
-}
-
 void RemoteMediaPlayerManager::SwapCurrentPlayer(int player_id) {
   // Find the remote player
   auto it = GetAlternativePlayer(player_id);
   if (it == alternative_players_.end())
     return;
   MediaPlayerAndroid* new_player = *it;
   scoped_ptr<MediaPlayerAndroid> old_player = SwapPlayer(player_id, new_player);
   alternative_players_.weak_erase(it);
   alternative_players_.push_back(old_player.release());
 }
@@ skipping 108 matching lines @@
     BrowserMediaPlayerManager::OnMediaMetadataChanged(player_id, duration,
                                                       width, height, success);
   }
 }
 
 bool RemoteMediaPlayerManager::IsPlayingRemotely(int player_id) {
   return players_playing_remotely_.count(player_id) != 0;
 }
 
 } // namespace remote_media