Added piping for sending audio packets from host to client.

remoting/protocol/connection_to_client.cc

Index: remoting/protocol/connection_to_client.cc
diff --git a/remoting/protocol/connection_to_client.cc b/remoting/protocol/connection_to_client.cc
index 03ee1fec34bf4da5915c2a05a5a0451352f64e6e..3441f4991231082dbffa492b8afaf092d34e2172 100644
--- a/remoting/protocol/connection_to_client.cc
+++ b/remoting/protocol/connection_to_client.cc
@@ -68,6 +68,11 @@ VideoStub* ConnectionToClient::video_stub() {
   return video_writer_.get();
 }
 
+AudioStub* ConnectionToClient::audio_stub() {
+  DCHECK(CalledOnValidThread());
+  return audio_writer_.get();
+}
+
 // Return pointer to ClientStub.
 ClientStub* ConnectionToClient::client_stub() {
   DCHECK(CalledOnValidThread());
@@ -120,6 +125,12 @@ void ConnectionToClient::OnSessionStateChange(Session::State state) {
       video_writer_->Init(session_.get(), base::Bind(
           &ConnectionToClient::OnChannelInitialized, base::Unretained(this)));
 
+      audio_writer_ = AudioWriter::Create(session_->config());
+      if (audio_writer_.get()) {
+        audio_writer_->Init(session_.get(), base::Bind(
+            &ConnectionToClient::OnChannelInitialized, base::Unretained(this)));
+      }
+
       // Notify the handler after initializing the channels, so that
       // ClientSession can get a client clipboard stub.
       handler_->OnConnectionAuthenticated(this);
@@ -156,11 +167,17 @@ void ConnectionToClient::OnChannelInitialized(bool successful) {
 void ConnectionToClient::NotifyIfChannelsReady() {
   DCHECK(CalledOnValidThread());
 
-  if (control_dispatcher_.get() && control_dispatcher_->is_connected() &&
-      event_dispatcher_.get() && event_dispatcher_->is_connected() &&
-      video_writer_.get() && video_writer_->is_connected()) {
-    handler_->OnConnectionChannelsConnected(this);
+  if (!control_dispatcher_.get() || !control_dispatcher_->is_connected())
+    return;
+  if (!event_dispatcher_.get() || !event_dispatcher_->is_connected())
+    return;
+  if (!video_writer_.get() || !video_writer_->is_connected())
+    return;
+  if ((!audio_writer_.get() || !audio_writer_->is_connected()) &&
+      session_->config().is_audio_enabled()) {
+    return;
   }
+  handler_->OnConnectionChannelsConnected(this);
 }
 
 void ConnectionToClient::Close(ErrorCode error) {
@@ -172,6 +189,7 @@ void ConnectionToClient::CloseChannels() {
   control_dispatcher_.reset();
   event_dispatcher_.reset();
   video_writer_.reset();
+  audio_writer_.reset();
 }
 
 }  // namespace protocol