Added an empty AudioTransportProxy to AudioState.

webrtc/test/mock_voice_engine.h

 /*
  *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #ifndef WEBRTC_AUDIO_MOCK_VOICE_ENGINE_H_
 #define WEBRTC_AUDIO_MOCK_VOICE_ENGINE_H_
 
 #include <memory>
 
+#include "webrtc/modules/audio_device/include/mock_audio_device.h"
+#include "webrtc/modules/audio_device/include/mock_audio_transport.h"
+#include "webrtc/modules/audio_processing/include/mock_audio_processing.h"
 #include "webrtc/test/gmock.h"
 #include "webrtc/test/mock_voe_channel_proxy.h"
 #include "webrtc/voice_engine/voice_engine_impl.h"
 
 namespace webrtc {
 namespace test {
 
 // NOTE: This class inherits from VoiceEngineImpl so that its clients will be
 // able to get the various interfaces as usual, via T::GetInterface().
 class MockVoiceEngine : public VoiceEngineImpl {
@@ skipping 14 matching lines @@
     // around Channel, we need to make sure ChannelProxy returns the same
     // decoder factory as the one passed in when creating an AudioReceiveStream.
     ON_CALL(*this, ChannelProxyFactory(testing::_))
         .WillByDefault(testing::Invoke([this](int channel_id) {
           auto* proxy =
               new testing::NiceMock<webrtc::test::MockVoEChannelProxy>();
           EXPECT_CALL(*proxy, GetAudioDecoderFactory())
               .WillRepeatedly(testing::ReturnRef(decoder_factory_));
           return proxy;
         }));
+
+    ON_CALL(*this, audio_device_module())
+        .WillByDefault(testing::Return(&mock_audio_device_));
+    ON_CALL(*this, audio_processing())
+        .WillByDefault(testing::Return(&mock_audio_processing_));
+    ON_CALL(*this, audio_transport())
+        .WillByDefault(testing::Return(&mock_audio_transport_));
   }
   ~MockVoiceEngine() /* override */ {
     // Decrease ref count before base class d-tor is called; otherwise it will
     // trigger an assertion.
     --_ref_count;
   }
   // Allows injecting a ChannelProxy factory.
   MOCK_METHOD1(ChannelProxyFactory, voe::ChannelProxy*(int channel_id));
 
   // VoiceEngineImpl
@@ skipping 44 matching lines @@
 
   // VoEBase
   MOCK_METHOD1(RegisterVoiceEngineObserver, int(VoiceEngineObserver& observer));
   MOCK_METHOD0(DeRegisterVoiceEngineObserver, int());
   MOCK_METHOD3(
       Init,
       int(AudioDeviceModule* external_adm,
           AudioProcessing* audioproc,
           const rtc::scoped_refptr<AudioDecoderFactory>& decoder_factory));
   MOCK_METHOD0(audio_processing, AudioProcessing*());
+  MOCK_METHOD0(audio_device_module, AudioDeviceModule*());
   MOCK_METHOD0(Terminate, int());
   MOCK_METHOD0(CreateChannel, int());
   MOCK_METHOD1(CreateChannel, int(const ChannelConfig& config));
   MOCK_METHOD1(DeleteChannel, int(int channel));
   MOCK_METHOD1(StartReceive, int(int channel));
   MOCK_METHOD1(StopReceive, int(int channel));
   MOCK_METHOD1(StartPlayout, int(int channel));
   MOCK_METHOD1(StopPlayout, int(int channel));
   MOCK_METHOD1(StartSend, int(int channel));
   MOCK_METHOD1(StopSend, int(int channel));
@@ skipping 199 matching lines @@
   MOCK_METHOD3(GetOutputVolumePan, int(int channel, float& left, float& right));
 
  private:
   // TODO(ossu): I'm not particularly happy about keeping the decoder factory
   // here, but due to how gmock is implemented, I cannot just keep it in the
   // functor implementing the default version of ChannelProxyFactory, above.
   // GMock creates an unfortunate copy of the functor, which would cause us to
   // return a dangling reference. Fortunately, this should go away once
   // voe::Channel does.
   rtc::scoped_refptr<AudioDecoderFactory> decoder_factory_;
+
+  MockAudioDeviceModule mock_audio_device_;
+  MockAudioProcessing mock_audio_processing_;
+  MockAudioTransport mock_audio_transport_;
 };
 }  // namespace test
 }  // namespace webrtc
 
 #endif  // WEBRTC_AUDIO_MOCK_VOICE_ENGINE_H_