Remove the SetLocalMonitor() API.

talk/media/base/fakemediaengine.h

 /*
  * libjingle
  * Copyright 2004 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 818 matching lines @@
   }
 
   bool SetOutputVolume(int level) {
     output_volume_ = level;
     options_changed_ = true;
     return true;
   }
 
   int GetInputLevel() { return 0; }
 
-  bool SetLocalMonitor(bool enable) { return true; }
-
   bool StartAecDump(rtc::PlatformFile file) { return false; }
 
   bool RegisterProcessor(uint32 ssrc, VoiceProcessor* voice_processor,
                          MediaProcessorDirection direction) {
     if (direction == MPD_RX) {
       rx_processor_ = voice_processor;
       return true;
     } else if (direction == MPD_TX) {
       tx_processor_ = voice_processor;
       return true;
@@ skipping 222 matching lines @@
 
  private:
   std::vector<FakeDataMediaChannel*> channels_;
   std::vector<DataCodec> data_codecs_;
   DataChannelType last_channel_type_;
 };
 
 }  // namespace cricket
 
 #endif  // TALK_MEDIA_BASE_FAKEMEDIAENGINE_H_