Remove dependency on AudioStub in ConnectionToClient

remoting/protocol/fake_connection_to_client.cc

Index: remoting/protocol/fake_connection_to_client.cc
diff --git a/remoting/protocol/fake_connection_to_client.cc b/remoting/protocol/fake_connection_to_client.cc
index 0f1cfc95761cf0828679714714881fb9e7df447f..4266274406653c022589f8ab6b9dd92fc75b21a5 100644
--- a/remoting/protocol/fake_connection_to_client.cc
+++ b/remoting/protocol/fake_connection_to_client.cc
@@ -7,6 +7,7 @@
 #include <utility>
 
 #include "remoting/codec/video_encoder.h"
+#include "remoting/protocol/audio_send_stream.h"
 #include "remoting/protocol/session.h"
 #include "remoting/protocol/video_frame_pump.h"
 #include "third_party/webrtc/modules/desktop_capture/desktop_capturer.h"
@@ -62,8 +63,10 @@ std::unique_ptr<VideoStream> FakeConnectionToClient::StartVideoStream(
   return std::move(result);
 }
 
-AudioStub* FakeConnectionToClient::audio_stub() {
-  return audio_stub_;
+std::unique_ptr<AudioSendStream> FakeConnectionToClient::StartAudioStream(
+    std::unique_ptr<AudioSource> audio_source) {
+  NOTIMPLEMENTED();
+  return nullptr;
 }
 
 ClientStub* FakeConnectionToClient::client_stub() {