[chrome/renderer/media] Replace MessageLoopProxy usage with ThreadTaskRunnerHandle

chrome/renderer/media/cast_session.h

 // Copyright 2013 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 CHROME_RENDERER_MEDIA_CAST_SESSION_H_
 #define CHROME_RENDERER_MEDIA_CAST_SESSION_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "net/base/ip_endpoint.h"
 
 namespace base {
 class BinaryValue;
 class DictionaryValue;
-class MessageLoopProxy;
+class SingleThreadTaskRunner;
 }  // namespace base
 
 namespace media {
 class VideoFrame;
 namespace cast {
 class AudioFrameInput;
 class VideoFrameInput;
 struct AudioSenderConfig;
 struct VideoSenderConfig;
 }  // namespace cast
@@ skipping 63 matching lines @@
  private:
   friend class base::RefCounted<CastSession>;
   virtual ~CastSession();
 
   // This member should never be dereferenced on the main thread.
   // CastSessionDelegate lives only on the IO thread. It is always
   // safe to post task on the IO thread to access CastSessionDelegate
   // because it is owned by this object.
   scoped_ptr<CastSessionDelegate> delegate_;
 
-  // Proxy to the IO message loop.
-  const scoped_refptr<base::MessageLoopProxy> io_message_loop_proxy_;
+  // Proxy to the IO task runner.
+  const scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(CastSession);
 };
 
 #endif  // CHROME_RENDERER_MEDIA_CAST_SESSION_H_