Introduce AudioIPCFactory.

content/renderer/pepper/pepper_platform_audio_output.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 CONTENT_RENDERER_PEPPER_PEPPER_PLATFORM_AUDIO_OUTPUT_H_
 #define CONTENT_RENDERER_PEPPER_PEPPER_PLATFORM_AUDIO_OUTPUT_H_
 
 #include <memory>
+#include <string>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "media/audio/audio_output_ipc.h"
 
 namespace media {
 class AudioParameters;
 }
 
 namespace base {
@@ skipping 72 matching lines @@
 
   scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
   scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(PepperPlatformAudioOutput);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_PLATFORM_AUDIO_OUTPUT_H_