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

content/browser/android/in_process/synchronous_compositor_factory_impl.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_BROWSER_ANDROID_IN_PROCESS_SYNCHRONOUS_COMPOSITOR_FACTORY_IMPL_H_
 #define CONTENT_BROWSER_ANDROID_IN_PROCESS_SYNCHRONOUS_COMPOSITOR_FACTORY_IMPL_H_
 
 #include "base/synchronization/lock.h"
 #include "content/browser/android/in_process/synchronous_input_event_filter.h"
 #include "content/renderer/android/synchronous_compositor_factory.h"
@@ skipping 48 matching lines @@
   void CompositorReleasedHardwareDraw();
 
   scoped_refptr<cc::ContextProvider>
       CreateOnscreenContextProviderForCompositorThread();
   gpu::GLInProcessContext* GetShareContext();
 
  private:
   bool CanCreateMainThreadContext();
   scoped_refptr<StreamTextureFactorySynchronousImpl::ContextProvider>
       TryCreateStreamTextureFactory();
+  void LoseContextOnMainThread();
+  void RestoreContextOnMainThread();
 
   SynchronousInputEventFilter synchronous_input_event_filter_;
 
   scoped_refptr<gpu::InProcessCommandBuffer::Service> service_;
   scoped_ptr<gpu::GLInProcessContext> share_context_;
-  scoped_refptr<StreamTextureFactorySynchronousImpl::ContextProvider>
-      video_context_provider_;
+
+  class VideoContextProvider;
+  scoped_refptr<VideoContextProvider> video_context_provider_;
 
   bool record_full_layer_;
 
   // |num_hardware_compositor_lock_| is updated on UI thread only but can be
   // read on renderer main thread.
   base::Lock num_hardware_compositor_lock_;
   unsigned int num_hardware_compositors_;
+  scoped_refptr<base::MessageLoopProxy> main_thread_proxy_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ANDROID_IN_PROCESS_SYNCHRONOUS_COMPOSITOR_FACTORY_IMPL_H_