Fold media::MessageLoopFactoryImpl into media::MessageLoopFactory.

media/base/message_loop_factory_impl.h

-// Copyright (c) 2011 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_BASE_MESSAGE_LOOP_FACTORY_IMPL_H_
-#define MEDIA_BASE_MESSAGE_LOOP_FACTORY_IMPL_H_
-
-#include <map>
-#include <string>
-
-#include "base/threading/thread.h"
-#include "media/base/message_loop_factory.h"
-
-namespace media {
-
-class MEDIA_EXPORT MessageLoopFactoryImpl : public MessageLoopFactory {
- public:
-  MessageLoopFactoryImpl();
-
-  // MessageLoopFactory methods.
-  virtual MessageLoop* GetMessageLoop(const std::string& name) OVERRIDE;
-  virtual scoped_refptr<base::MessageLoopProxy> GetMessageLoopProxy(
-      const std::string& name) OVERRIDE;
-
- protected:
-  virtual ~MessageLoopFactoryImpl();
-
- private:
-  // Lock used to serialize access for the following data members.
-  base::Lock lock_;
-
-  typedef std::map<std::string, base::Thread*> ThreadMap;
-  ThreadMap thread_map_;
-
-  DISALLOW_COPY_AND_ASSIGN(MessageLoopFactoryImpl);
-};
-
-}  // namespace media
-
-#endif  // MEDIA_BASE_MESSAGE_LOOP_FACTORY_IMPL_H_