Add Audio support in Chromoting host when using WebRTC.

remoting/protocol/audio_pump_unittest.cc

Index: remoting/protocol/audio_pump_unittest.cc
diff --git a/remoting/protocol/audio_pump_unittest.cc b/remoting/protocol/audio_pump_unittest.cc
index a118bec8f01499f66ca45516683b42953ea1f878..67ce2ac9ed1e1677cb58afd44473e095c9cec552 100644
--- a/remoting/protocol/audio_pump_unittest.cc
+++ b/remoting/protocol/audio_pump_unittest.cc
@@ -17,6 +17,7 @@
 #include "remoting/proto/audio.pb.h"
 #include "remoting/protocol/audio_source.h"
 #include "remoting/protocol/audio_stub.h"
+#include "remoting/protocol/fake_audio_source.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace remoting {
@@ -33,24 +34,6 @@ std::unique_ptr<AudioPacket> MakeAudioPacket() {
 
 }  // namespace
 
-class FakeAudioSource : public AudioSource {
- public:
-  FakeAudioSource() {}
-  ~FakeAudioSource() override {}
-
-  bool Start(const PacketCapturedCallback& callback) override {
-    callback_ = callback;
-    return true;
-  }
-
-  const PacketCapturedCallback& callback() { return callback_; }
-
- private:
-  PacketCapturedCallback callback_;
-
-  DISALLOW_COPY_AND_ASSIGN(FakeAudioSource);
-};
-
 class FakeAudioEncoder : public AudioEncoder {
  public:
   FakeAudioEncoder() {}