Add AudioReceiveStream::SetGain() method and use that in WVoMC::SetOutputVolume().

webrtc/media/engine/fakewebrtccall.cc

 /*
  *  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.
  */
 
@@ skipping 35 matching lines @@
   latest_telephone_event_.duration_ms = duration_ms;
   return true;
 }
 
 webrtc::AudioSendStream::Stats FakeAudioSendStream::GetStats() const {
   return stats_;
 }
 
 FakeAudioReceiveStream::FakeAudioReceiveStream(
     const webrtc::AudioReceiveStream::Config& config)
-    : config_(config), received_packets_(0) {
+    : config_(config) {
   RTC_DCHECK(config.voe_channel_id != -1);
 }
 
 const webrtc::AudioReceiveStream::Config&
     FakeAudioReceiveStream::GetConfig() const {
   return config_;
 }
 
 void FakeAudioReceiveStream::SetStats(
     const webrtc::AudioReceiveStream::Stats& stats) {
@@ skipping 15 matching lines @@
 
 webrtc::AudioReceiveStream::Stats FakeAudioReceiveStream::GetStats() const {
   return stats_;
 }
 
 void FakeAudioReceiveStream::SetSink(
     std::unique_ptr<webrtc::AudioSinkInterface> sink) {
   sink_ = std::move(sink);
 }
 
+void FakeAudioReceiveStream::SetGain(float gain) {
+  gain_ = gain;
+}
+
 FakeVideoSendStream::FakeVideoSendStream(
     const webrtc::VideoSendStream::Config& config,
     const webrtc::VideoEncoderConfig& encoder_config)
     : sending_(false),
       config_(config),
       codec_settings_set_(false),
       num_swapped_frames_(0) {
   RTC_DCHECK(config.encoder_settings.encoder != NULL);
   ReconfigureVideoEncoder(encoder_config);
 }
@@ skipping 358 matching lines @@
     case webrtc::MediaType::ANY:
       ADD_FAILURE()
           << "SignalChannelNetworkState called with unknown parameter.";
   }
 }
 
 void FakeCall::OnSentPacket(const rtc::SentPacket& sent_packet) {
   last_sent_packet_ = sent_packet;
 }
 }  // namespace cricket