[Android] Stop all media on undoable close.

content/browser/media/media_web_contents_observer.cc

 // Copyright 2014 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 "content/browser/media/media_web_contents_observer.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/stl_util.h"
 #include "content/browser/media/cdm/browser_cdm_manager.h"
 #include "content/common/media/cdm_messages.h"
@@ skipping 173 matching lines @@
 }
 
 void MediaWebContentsObserver::PauseVideo() {
   for (MediaPlayerManagerMap::iterator iter = media_player_managers_.begin();
       iter != media_player_managers_.end(); ++iter) {
     BrowserMediaPlayerManager* manager = iter->second;
     manager->PauseVideo();
   }
 }
 
+void MediaWebContentsObserver::ReleaseAllMediaPlayers(
+    RenderFrameHost* render_frame_host) {
+  BrowserMediaPlayerManager* manager = GetMediaPlayerManager(render_frame_host);
+  if (manager)
+    manager->ReleaseAllMediaPlayers();
+}
+
 #if defined(VIDEO_HOLE)
 void MediaWebContentsObserver::OnFrameInfoUpdated() {
   for (MediaPlayerManagerMap::iterator iter = media_player_managers_.begin();
       iter != media_player_managers_.end(); ++iter) {
     BrowserMediaPlayerManager* manager = iter->second;
     manager->OnFrameInfoUpdated();
   }
 }
 #endif  // defined(VIDEO_HOLE)
 
 #endif  // defined(OS_ANDROID)
 
 }  // namespace content