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

content/renderer/pepper/pepper_platform_audio_output_impl.cc

Index: content/renderer/pepper/pepper_platform_audio_output_impl.cc
diff --git a/content/renderer/pepper/pepper_platform_audio_output_impl.cc b/content/renderer/pepper/pepper_platform_audio_output_impl.cc
index 65239e615fa5a0e859729044a9dcaf706719b04c..2d64bf27d425adfb11198459a71773c0936abcaa 100644
--- a/content/renderer/pepper/pepper_platform_audio_output_impl.cc
+++ b/content/renderer/pepper/pepper_platform_audio_output_impl.cc
@@ -11,6 +11,7 @@
 #include "content/common/child_process.h"
 #include "content/common/media/audio_messages.h"
 #include "content/renderer/media/audio_hardware.h"
+#include "content/renderer/media/audio_message_filter.h"
 #include "content/renderer/render_thread_impl.h"
 
 namespace content {
@@ -31,7 +32,7 @@ PepperPlatformAudioOutputImpl* PepperPlatformAudioOutputImpl::Create(
 }
 
 bool PepperPlatformAudioOutputImpl::StartPlayback() {
-  if (filter_) {
+  if (ipc_) {
     ChildProcess::current()->io_message_loop()->PostTask(
         FROM_HERE,
         base::Bind(&PepperPlatformAudioOutputImpl::StartPlaybackOnIOThread,
@@ -42,7 +43,7 @@ bool PepperPlatformAudioOutputImpl::StartPlayback() {
 }
 
 bool PepperPlatformAudioOutputImpl::StopPlayback() {
-  if (filter_) {
+  if (ipc_) {
     ChildProcess::current()->io_message_loop()->PostTask(
         FROM_HERE,
         base::Bind(&PepperPlatformAudioOutputImpl::StopPlaybackOnIOThread,
@@ -61,7 +62,9 @@ void PepperPlatformAudioOutputImpl::ShutDown() {
       base::Bind(&PepperPlatformAudioOutputImpl::ShutDownOnIOThread, this));
 }
 
-void PepperPlatformAudioOutputImpl::OnStateChanged(AudioStreamState state) {}
+void PepperPlatformAudioOutputImpl::OnStateChanged(
+    media::AudioStreamState state) {
+}
 
 void PepperPlatformAudioOutputImpl::OnStreamCreated(
     base::SharedMemoryHandle handle,
@@ -99,7 +102,7 @@ PepperPlatformAudioOutputImpl::PepperPlatformAudioOutputImpl()
     : client_(NULL),
       stream_id_(0),
       main_message_loop_proxy_(base::MessageLoopProxy::current()) {
-  filter_ = RenderThreadImpl::current()->audio_message_filter();
+  ipc_ = RenderThreadImpl::current()->audio_message_filter();
 }
 
 bool PepperPlatformAudioOutputImpl::Initialize(
@@ -136,18 +139,18 @@ bool PepperPlatformAudioOutputImpl::Initialize(
 
 void PepperPlatformAudioOutputImpl::InitializeOnIOThread(
     const media::AudioParameters& params) {
-  stream_id_ = filter_->AddDelegate(this);
-  filter_->Send(new AudioHostMsg_CreateStream(stream_id_, params));
+  stream_id_ = ipc_->AddDelegate(this);
+  ipc_->CreateStream(stream_id_, params);
 }
 
 void PepperPlatformAudioOutputImpl::StartPlaybackOnIOThread() {
   if (stream_id_)
-    filter_->Send(new AudioHostMsg_PlayStream(stream_id_));
+    ipc_->PlayStream(stream_id_);
 }
 
 void PepperPlatformAudioOutputImpl::StopPlaybackOnIOThread() {
   if (stream_id_)
-    filter_->Send(new AudioHostMsg_PauseStream(stream_id_));
+    ipc_->PauseStream(stream_id_);
 }
 
 void PepperPlatformAudioOutputImpl::ShutDownOnIOThread() {
@@ -155,8 +158,8 @@ void PepperPlatformAudioOutputImpl::ShutDownOnIOThread() {
   if (!stream_id_)
     return;
 
-  filter_->Send(new AudioHostMsg_CloseStream(stream_id_));
-  filter_->RemoveDelegate(stream_id_);
+  ipc_->CloseStream(stream_id_);
+  ipc_->RemoveDelegate(stream_id_);
   stream_id_ = 0;
 
   Release();  // Release for the delegate, balances out the reference taken in