Create and use mojo::Binding on the same thread.

media/mojo/services/mojo_renderer_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 MEDIA_MOJO_SERVICES_MOJO_RENDERER_IMPL_H_
 #define MEDIA_MOJO_SERVICES_MOJO_RENDERER_IMPL_H_
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "media/base/renderer.h"
@@ skipping 48 matching lines @@
 
  private:
   // Called when |remote_renderer_| has finished initializing.
   void OnInitialized(bool success);
 
   // Task runner used to execute pipeline tasks.
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   DemuxerStreamProvider* demuxer_stream_provider_;
   interfaces::RendererPtr remote_renderer_;
-  mojo::Binding<RendererClient> binding_;
+  scoped_ptr<mojo::Binding<RendererClient>> binding_;
 
   // Callbacks passed to Initialize() that we forward messages from
   // |remote_renderer_| through.
   PipelineStatusCB init_cb_;
   base::Closure ended_cb_;
   PipelineStatusCB error_cb_;
   BufferingStateCB buffering_state_cb_;
 
   // Lock used to serialize access for the following data members.
   mutable base::Lock lock_;
 
   base::TimeDelta time_;
   // TODO(xhwang): It seems we don't need |max_time_| now. Drop it!
   base::TimeDelta max_time_;
 
   base::WeakPtrFactory<MojoRendererImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MojoRendererImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_MOJO_SERVICES_MOJO_RENDERER_IMPL_H_