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

content/renderer/media/audio_input_device.cc

Index: content/renderer/media/audio_input_device.cc
diff --git a/content/renderer/media/audio_input_device.cc b/content/renderer/media/audio_input_device.cc
index 6d8514375575339aa1be3108811e5e3fe52d1f27..f075cb7d3e1a0f05e47087dbcfa2a67041c92050 100644
--- a/content/renderer/media/audio_input_device.cc
+++ b/content/renderer/media/audio_input_device.cc
@@ -133,7 +133,7 @@ void AudioInputDevice::OnVolume(double volume) {
   NOTIMPLEMENTED();
 }
 
-void AudioInputDevice::OnStateChanged(AudioStreamState state) {
+void AudioInputDevice::OnStateChanged(media::AudioStreamState state) {
   DCHECK(message_loop()->BelongsToCurrentThread());
 
   // Do nothing if the stream has been closed.
@@ -143,7 +143,7 @@ void AudioInputDevice::OnStateChanged(AudioStreamState state) {
   switch (state) {
     // TODO(xians): This should really be kAudioStreamStopped since the stream
     // has been closed at this point.
-    case kAudioStreamPaused:
+    case media::kAudioStreamPaused:
       // TODO(xians): Should we just call ShutDownOnIOThread here instead?
       filter_->RemoveDelegate(stream_id_);
 
@@ -156,10 +156,10 @@ void AudioInputDevice::OnStateChanged(AudioStreamState state) {
       stream_id_ = 0;
       pending_device_ready_ = false;
       break;
-    case kAudioStreamPlaying:
+    case media::kAudioStreamPlaying:
       NOTIMPLEMENTED();
       break;
-    case kAudioStreamError:
+    case media::kAudioStreamError:
       DLOG(WARNING) << "AudioInputDevice::OnStateChanged(kError)";
       // Don't dereference the callback object if the audio thread
       // is stopped or stopping.  That could mean that the callback