Split the media context from the compositor worker context.

content/renderer/render_thread_impl.h

 // Copyright (c) 2012 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_RENDER_THREAD_IMPL_H_
 #define CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 321 matching lines @@
   scoped_refptr<base::SingleThreadTaskRunner> GetFileThreadMessageLoopProxy();
 
   // Returns a SingleThreadTaskRunner instance corresponding to the message loop
   // of the thread on which media operations should be run. Must be called
   // on the renderer's main thread.
   scoped_refptr<base::SingleThreadTaskRunner> GetMediaThreadTaskRunner();
 
   // A TaskRunner instance that runs tasks on the raster worker pool.
   base::TaskRunner* GetWorkerTaskRunner();
 
-  // Returns a shared worker context provider that can be used on any thread.
-  scoped_refptr<ContextProviderCommandBuffer> SharedWorkerContextProvider();
+  // Returns a worker context provider that will be bound on the compositor
+  // thread.
+  scoped_refptr<ContextProviderCommandBuffer>
+  SharedCompositorWorkerContextProvider();
 
   // Causes the idle handler to skip sending idle notifications
   // on the two next scheduled calls, so idle notifications are
   // not sent for at least one notification delay.
   void PostponeIdleNotification();
 
   media::GpuVideoAcceleratorFactories* GetGpuFactories();
 
   scoped_refptr<ContextProviderCommandBuffer> SharedMainThreadContextProvider();
 
@@ skipping 348 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(RenderThreadImpl);
 };
 
 #if defined(COMPILER_MSVC)
 #pragma warning(pop)
 #endif
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_THREAD_IMPL_H_