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

content/common/media/audio_messages.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.
 
 // IPC messages for the audio.
 // Multiply-included message file, hence no include guard.
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/shared_memory.h"
 #include "base/sync_socket.h"
 #include "content/common/content_export.h"
 #include "content/common/media/audio_param_traits.h"
-#include "content/common/media/audio_stream_state.h"
 #include "ipc/ipc_message_macros.h"
 #include "media/audio/audio_buffers_state.h"
+#include "media/audio/audio_input_ipc.h"
+#include "media/audio/audio_output_ipc.h"
 #include "media/audio/audio_parameters.h"
 
 #undef IPC_MESSAGE_EXPORT
 #define IPC_MESSAGE_EXPORT CONTENT_EXPORT
 #define IPC_MESSAGE_START AudioMsgStart
 
-IPC_ENUM_TRAITS(AudioStreamState)
+IPC_ENUM_TRAITS(media::AudioInputIPCDelegate::State)
+IPC_ENUM_TRAITS(media::AudioOutputIPCDelegate::State)
 
 IPC_STRUCT_TRAITS_BEGIN(media::AudioBuffersState)
   IPC_STRUCT_TRAITS_MEMBER(pending_bytes)
   IPC_STRUCT_TRAITS_MEMBER(hardware_delay_bytes)
 IPC_STRUCT_TRAITS_END()
 
 // Messages sent from the browser to the renderer.
 
 // Tell the renderer process that an audio stream has been created.
 // The renderer process is given a shared memory handle for the audio data
@@ skipping 28 matching lines @@
                      int /* stream id */,
                      base::SharedMemoryHandle /* handle */,
                      base::FileDescriptor /* socket handle */,
                      uint32 /* length */)
 #endif
 
 // Notification message sent from AudioRendererHost to renderer for state
 // update after the renderer has requested a Create/Start/Close.
 IPC_MESSAGE_CONTROL2(AudioMsg_NotifyStreamStateChanged,
                      int /* stream id */,
-                     AudioStreamState /* new state */)
+                     media::AudioOutputIPCDelegate::State /* new state */)
 
 // Notification message sent from browser to renderer for state update.
 IPC_MESSAGE_CONTROL2(AudioInputMsg_NotifyStreamStateChanged,
                      int /* stream id */,
-                     AudioStreamState /* new state */)
+                     media::AudioInputIPCDelegate::State /* new state */)
 
 IPC_MESSAGE_CONTROL2(AudioInputMsg_NotifyStreamVolume,
                      int /* stream id */,
                      double /* volume */)
 
 IPC_MESSAGE_CONTROL2(AudioInputMsg_NotifyDeviceStarted,
                      int /* stream id */,
                      std::string /* device_id */)
 
 // Messages sent from the renderer to the browser.
@@ skipping 43 matching lines @@
 // Set audio volume of the input stream specified by stream_id.
 IPC_MESSAGE_CONTROL2(AudioInputHostMsg_SetVolume,
                      int /* stream_id */,
                      double /* volume */)
 
 // Start the device referenced by the session_id for the input stream specified
 // by stream_id.
 IPC_MESSAGE_CONTROL2(AudioInputHostMsg_StartDevice,
                      int /* stream_id */,
                      int /* session_id */)