Changed the interface AudioMixer::RemoveSource to have a void return type.

webrtc/modules/audio_mixer/audio_mixer_impl.cc

 /*
  *  Copyright (c) 2012 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 262 matching lines @@
 bool AudioMixerImpl::AddSource(Source* audio_source) {
   RTC_DCHECK(audio_source);
   rtc::CritScope lock(&crit_);
   RTC_DCHECK(FindSourceInList(audio_source, &audio_source_list_) ==
              audio_source_list_.end())
       << "Source already added to mixer";
   audio_source_list_.emplace_back(new SourceStatus(audio_source, false, 0));
   return true;
 }
 
-bool AudioMixerImpl::RemoveSource(Source* audio_source) {
+void AudioMixerImpl::RemoveSource(Source* audio_source) {
   RTC_DCHECK(audio_source);
   rtc::CritScope lock(&crit_);
   const auto iter = FindSourceInList(audio_source, &audio_source_list_);
   RTC_DCHECK(iter != audio_source_list_.end()) << "Source not present in mixer";
   audio_source_list_.erase(iter);
-  return true;
 }
 
 AudioFrameList AudioMixerImpl::GetAudioFromSources() {
   RTC_DCHECK_RUNS_SERIALIZED(&race_checker_);
   AudioFrameList result;
   std::vector<SourceFrame> audio_source_mixing_data_list;
   std::vector<SourceFrame> ramp_list;
 
   // Get audio from the audio sources and put it in the SourceFrame vector.
   for (auto& source_and_status : audio_source_list_) {
@@ skipping 75 matching lines @@
 
   const auto iter = FindSourceInList(audio_source, &audio_source_list_);
   if (iter != audio_source_list_.end()) {
     return (*iter)->is_mixed;
   }
 
   LOG(LS_ERROR) << "Audio source unknown";
   return false;
 }
 }  // namespace webrtc