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 b53c645f75ef7ccfa26c5bf0a398ae8ecf2bee14..31e9ab0fb465d9792eec085af1b77856973a3d2c 100644
--- a/talk/media/base/fakemediaengine.h
+++ b/talk/media/base/fakemediaengine.h
@@ -825,6 +825,10 @@ 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_;