Chromecast: CmaMessageFilterHost SetCdm threading change.

chromecast/browser/media/cma_message_loop.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 CHROMECAST_BROWSER_MEDIA_CMA_MESSAGE_LOOP_H_
 #define CHROMECAST_BROWSER_MEDIA_CMA_MESSAGE_LOOP_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/singleton.h"
 
 namespace base {
 class MessageLoopProxy;
+class SingleThreadTaskRunner;
 class Thread;
 }
 
 namespace chromecast {
 namespace media {
 
 class CmaMessageLoop {
  public:
+  // TODO(gunsch): clean up references to deprecated Message*Loop*Proxy.
   static scoped_refptr<base::MessageLoopProxy> GetMessageLoopProxy();
+  static scoped_refptr<base::SingleThreadTaskRunner> GetTaskRunner();
 
  private:
   friend struct DefaultSingletonTraits<CmaMessageLoop>;
   friend class Singleton<CmaMessageLoop>;
 
   static CmaMessageLoop* GetInstance();
 
   CmaMessageLoop();
   ~CmaMessageLoop();
 
   scoped_ptr<base::Thread> thread_;
 
   DISALLOW_COPY_AND_ASSIGN(CmaMessageLoop);
 };
 
 }  // namespace media
 }  // namespace chromecast
 
 #endif  // CHROMECAST_BROWSER_MEDIA_CMA_MESSAGE_LOOP_H_