Added functions on libjingle API to start and stop the recording of an RtcEventLog.

talk/media/base/fakemediaengine.h

Index: talk/media/base/fakemediaengine.h
diff --git a/talk/media/base/fakemediaengine.h b/talk/media/base/fakemediaengine.h
index 7325667aa544568cf29199af4736e5f6c6ffb519..43323f7593ec984fbca3845528ba3f6fd1198453 100644
--- a/talk/media/base/fakemediaengine.h
+++ b/talk/media/base/fakemediaengine.h
@@ -816,6 +816,10 @@ class FakeVoiceEngine : public FakeBaseEngine {
 
   bool StartAecDump(rtc::PlatformFile file) { return false; }
 
+  bool StartRtcEventLog(rtc::PlatformFile file) { return false; }
+
+  void StopRtcEventLog() {}
+
  private:
   std::vector<FakeVoiceMediaChannel*> channels_;
   std::vector<AudioCodec> codecs_;