Added piping for sending audio packets from host to client.

remoting/host/screen_recorder.cc

Index: remoting/host/screen_recorder.cc
diff --git a/remoting/host/screen_recorder.cc b/remoting/host/screen_recorder.cc
index e7b414c9afbe0d909bfd7806ad10bb00fbdb1bc3..925102af16fdc63c652b84b0e68392d2abcd97e8 100644
--- a/remoting/host/screen_recorder.cc
+++ b/remoting/host/screen_recorder.cc
@@ -280,6 +280,23 @@ void ScreenRecorder::VideoFrameSentCallback() {
       FROM_HERE, base::Bind(&ScreenRecorder::DoFinishOneRecording, this));
 }
 
+void ScreenRecorder::DoSendAudioPacket(scoped_ptr<AudioPacket> packet) {
+  DCHECK(network_loop_->BelongsToCurrentThread());
+
+  if (network_stopped_ || connections_.empty())
+    return;
+
+  base::Closure callback = base::Bind(
+      &ScreenRecorder::AudioSamplesSentCallback, this);
+
+  connections_.front()->audio_stub()->ProcessAudioPacket(
+      packet.Pass(), callback);
+}
+
+void ScreenRecorder::AudioSamplesSentCallback() {
+  // TODO(kxing): continue sending audio packets
+}
+
 void ScreenRecorder::DoStopOnNetworkThread(const base::Closure& done_task) {
   DCHECK(network_loop_->BelongsToCurrentThread());