Vanquish the remnants of media::MessageLoopFactory.

media/base/message_loop_factory.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 MEDIA_BASE_MESSAGE_LOOP_FACTORY_H_
-#define MEDIA_BASE_MESSAGE_LOOP_FACTORY_H_
-
-#include <list>
-#include <string>
-
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/message_loop_proxy.h"
-#include "base/synchronization/lock.h"
-#include "media/base/media_export.h"
-
-class MessageLoop;
-
-namespace base {
-class Thread;
-}
-
-namespace media {
-
-// Factory object that manages named MessageLoops.
-//
-// TODO(scherkus): replace this with something simpler http://crbug.com/116873
-class MEDIA_EXPORT MessageLoopFactory {
- public:
-  enum Type {
-    kPipeline
-  };
-
-  MessageLoopFactory();
-
-  // Get the message loop proxy associated with |type|. A new MessageLoopProxy
-  // is created if the factory doesn't have one associated with |type|.
-  scoped_refptr<base::MessageLoopProxy> GetMessageLoop(Type type);
-
- private:
-  // Restrict who can delete the factory to scoped_ptr<>. scoped_ptr<> uses
-  // base::DefaultDeleter.
-  friend struct base::DefaultDeleter<MessageLoopFactory>;
-  ~MessageLoopFactory();
-
-  // Returns the thread associated with |type| creating a new thread if needed.
-  base::Thread* GetThread(Type type);
-
-  // Lock used to serialize access for the following data members.
-  base::Lock lock_;
-
-  // List of pairs of created threads and their types.  We use a list to ensure
-  // threads are stopped & deleted in reverse order of creation.
-  typedef std::list<std::pair<Type, base::Thread*> > ThreadList;
-  ThreadList threads_;
-
-  DISALLOW_COPY_AND_ASSIGN(MessageLoopFactory);
-};
-
-}  // namespace media
-
-#endif  // MEDIA_BASE_MESSAGE_LOOP_FACTORY_H_