work-in-progress patch to fix context lost black video

content/renderer/media/android/webmediaplayer_android.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 CONTENT_RENDERER_MEDIA_ANDROID_WEBMEDIAPLAYER_ANDROID_H_
 #define CONTENT_RENDERER_MEDIA_ANDROID_WEBMEDIAPLAYER_ANDROID_H_
 
 #include <jni.h>
 #include <string>
 #include <vector>
@@ skipping 52 matching lines @@
 class RendererMediaPlayerManager;
 class WebContentDecryptionModuleImpl;
 class WebMediaPlayerDelegate;
 
 // This class implements blink::WebMediaPlayer by keeping the android
 // media player in the browser process. It listens to all the status changes
 // sent from the browser process and sends playback controls to the media
 // player.
 class WebMediaPlayerAndroid : public blink::WebMediaPlayer,
                               public cc::VideoFrameProvider,
-                              public RenderFrameObserver {
+                              public RenderFrameObserver,
+                              public StreamTextureFactoryContextObserver {
  public:
   // Construct a WebMediaPlayerAndroid object. This class communicates with the
   // MediaPlayerAndroid object in the browser process through |proxy|.
   // TODO(qinmin): |frame| argument is used to determine whether the current
   // player can enter fullscreen. This logic should probably be moved into
   // blink, so that enterFullscreen() will not be called if another video is
   // already in fullscreen.
   WebMediaPlayerAndroid(
       blink::WebFrame* frame,
       blink::WebMediaPlayerClient* client,
@@ skipping 105 matching lines @@
 
   // Functions called when media player status changes.
   void OnConnectedToRemoteDevice(const std::string& remote_playback_message);
   void OnDisconnectedFromRemoteDevice();
   void OnDidEnterFullscreen();
   void OnDidExitFullscreen();
   void OnMediaPlayerPlay();
   void OnMediaPlayerPause();
   void OnRequestFullscreen();
 
+  // StreamTextureFactoryContextObserver implementation.
+  virtual void OnContextLost() OVERRIDE;
+  virtual void OnContextRestored() OVERRIDE;
+
   // Called when the player is released.
   virtual void OnPlayerReleased();
 
   // This function is called by the RendererMediaPlayerManager to pause the
   // video and release the media player and surface texture when we switch tabs.
   // However, the actual GlTexture is not released to keep the video screenshot.
   virtual void ReleaseMediaResources();
 
   // RenderFrameObserver implementation.
   virtual void OnDestruct() OVERRIDE;
@@ skipping 286 matching lines @@
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<WebMediaPlayerAndroid> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerAndroid);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_ANDROID_WEBMEDIAPLAYER_ANDROID_H_