Switch stream creation and closing in Chrome audio rendering from IPC to Mojo

content/renderer/media/audio_message_filter.cc

Index: content/renderer/media/audio_message_filter.cc
diff --git a/content/renderer/media/audio_message_filter.cc b/content/renderer/media/audio_message_filter.cc
index 9e7322d128e65f0d5f9507a544c8cf01943e7d16..2e74b6cbb3335591a840e04f8c945b17710b65fc 100644
--- a/content/renderer/media/audio_message_filter.cc
+++ b/content/renderer/media/audio_message_filter.cc
@@ -82,6 +82,10 @@ std::unique_ptr<media::AudioOutputIPC> AudioMessageFilter::CreateAudioOutputIPC(
       new AudioOutputIPCImpl(this, render_frame_id));
 }
 
+void AudioMessageFilter::CloseStream(int stream_id) {
+  Send(new AudioHostMsg_CloseStream(stream_id));
+}
+
 void AudioMessageFilter::AudioOutputIPCImpl::RequestDeviceAuthorization(
     media::AudioOutputIPCDelegate* delegate,
     int session_id,
@@ -103,11 +107,16 @@ void AudioMessageFilter::AudioOutputIPCImpl::CreateStream(
     const media::AudioParameters& params) {
   DCHECK(filter_->io_task_runner_->BelongsToCurrentThread());
   DCHECK(!stream_created_);
+  auto client = filter_->audio_output_clients_.find(render_frame_id_);
+  if (client == filter_->audio_output_clients_.end())
+    return;
   if (stream_id_ == kStreamIDNotSet)
     stream_id_ = filter_->delegates_.Add(delegate);
+  // TODO(rchtara): This is temporary. In soon upcoming CLs AudioMessageFilter
+  // and AudioMessageFilter::AudioOutputIPCImpl will be removed and replaced by
+  // AudioOutputClient.
 
-  filter_->Send(
-      new AudioHostMsg_CreateStream(stream_id_, render_frame_id_, params));
+  client->second->CreateStream(stream_id_, params);
   stream_created_ = true;
 }
 
@@ -124,7 +133,13 @@ void AudioMessageFilter::AudioOutputIPCImpl::PauseStream() {
 void AudioMessageFilter::AudioOutputIPCImpl::CloseStream() {
   DCHECK(filter_->io_task_runner_->BelongsToCurrentThread());
   DCHECK_NE(stream_id_, kStreamIDNotSet);
-  filter_->Send(new AudioHostMsg_CloseStream(stream_id_));
+  auto client = filter_->audio_output_clients_.find(render_frame_id_);
+  if (client == filter_->audio_output_clients_.end())
+    return;
+  // TODO(rchtara): This is temporary. In soon upcoming CLs AudioMessageFilter
+  // and AudioMessageFilter::AudioOutputIPCImpl will be removed and replaced by
+  // AudioOutputClient.
+  client->second->CloseStream(stream_id_);
   filter_->delegates_.Remove(stream_id_);
   stream_id_ = kStreamIDNotSet;
   stream_created_ = false;
@@ -149,7 +164,6 @@ bool AudioMessageFilter::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(AudioMessageFilter, message)
     IPC_MESSAGE_HANDLER(AudioMsg_NotifyDeviceAuthorized, OnDeviceAuthorized)
-    IPC_MESSAGE_HANDLER(AudioMsg_NotifyStreamCreated, OnStreamCreated)
     IPC_MESSAGE_HANDLER(AudioMsg_NotifyStreamStateChanged, OnStreamStateChanged)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()