First step towards moving AudioDevice from content/ to media/audio.

content/browser/renderer_host/media/audio_input_device_manager.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.
 //
 // AudioInputDeviceManager manages the audio input devices. In particular it
 // communicates with MediaStreamManager and AudioInputRendererHost on the
 // browser IO thread, handles queries like enumerate/open/close from
 // MediaStreamManager and start/stop from AudioInputRendererHost.
 // The work for enumerate/open/close is handled asynchronously on Media Stream
 // device thread, while start/stop are synchronous on the IO thread.
@@ skipping 20 matching lines @@
 
 class CONTENT_EXPORT AudioInputDeviceManager
     : public base::RefCountedThreadSafe<AudioInputDeviceManager>,
       public MediaStreamProvider {
  public:
   // Calling Start() with this kFakeOpenSessionId will open the default device,
   // even though Open() has not been called. This is used to be able to use the
   // AudioInputDeviceManager before MediaStream is implemented.
   static const int kFakeOpenSessionId;
 
-  static const int kInvalidSessionId;
-  static const char kInvalidDeviceId[];
-
   explicit AudioInputDeviceManager(media::AudioManager* audio_manager);
 
   // MediaStreamProvider implementation, called on IO thread.
   virtual void Register(MediaStreamProviderListener* listener,
                         base::MessageLoopProxy* device_thread_loop) OVERRIDE;
   virtual void Unregister() OVERRIDE;
   virtual void EnumerateDevices() OVERRIDE;
   virtual int Open(const StreamDeviceInfo& device) OVERRIDE;
   virtual void Close(int session_id) OVERRIDE;
 
@@ skipping 34 matching lines @@
 
   // The message loop of media stream device thread that this object runs on.
   scoped_refptr<base::MessageLoopProxy> device_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioInputDeviceManager);
 };
 
 }  // namespace media_stream
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_DEVICE_MANAGER_H_