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

content/renderer/media/android/stream_texture_factory.h

 // 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.
 
 #ifndef CONTENT_RENDERER_MEDIA_ANDROID_STREAM_TEXTURE_FACTORY_H_
 #define CONTENT_RENDERER_MEDIA_ANDROID_STREAM_TEXTURE_FACTORY_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "cc/layers/video_frame_provider.h"
@@ skipping 26 matching lines @@
   virtual void Release() = 0;
 
   struct Deleter {
     inline void operator()(StreamTextureProxy* ptr) const { ptr->Release(); }
   };
 };
 
 typedef scoped_ptr<StreamTextureProxy, StreamTextureProxy::Deleter>
     ScopedStreamTextureProxy;
 
+class StreamTextureFactoryContextObserver {
+ public:
+  ~StreamTextureFactoryContextObserver() {}
+  virtual void OnContextLost() = 0;
+  virtual void OnContextRestored() = 0;
+};
+
 // Factory class for managing stream textures.
 class StreamTextureFactory : public base::RefCounted<StreamTextureFactory> {
  public:
   // Create the StreamTextureProxy object.
   virtual StreamTextureProxy* CreateProxy() = 0;
 
   // Send an IPC message to the browser process to request a java surface
   // object for the given stream_id. After the the surface is created,
   // it will be passed back to the WebMediaPlayerAndroid object identified by
   // the player_id.
   virtual void EstablishPeer(int32 stream_id, int player_id) = 0;
 
   // Creates a StreamTexture and returns its id.  Sets |*texture_id| to the
   // client-side id of the StreamTexture. The texture is produced into
   // a mailbox so it can be shipped in a VideoFrame.
   virtual unsigned CreateStreamTexture(unsigned texture_target,
                                        unsigned* texture_id,
                                        gpu::Mailbox* texture_mailbox) = 0;
 
   // Set the streamTexture size for the given stream Id.
   virtual void SetStreamTextureSize(int32 texture_id,
                                     const gfx::Size& size) = 0;
 
   virtual gpu::gles2::GLES2Interface* ContextGL() = 0;
 
+  virtual void AddObserver(StreamTextureFactoryContextObserver* obs) = 0;
+  virtual void RemoveObserver(StreamTextureFactoryContextObserver* obs) = 0;
+
  protected:
   friend class base::RefCounted<StreamTextureFactory>;
   virtual ~StreamTextureFactory() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_ANDROID_STREAM_TEXTURE_FACTORY_H_