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

talk/media/webrtc/webrtcvoiceengine.h

Index: talk/media/webrtc/webrtcvoiceengine.h
diff --git a/talk/media/webrtc/webrtcvoiceengine.h b/talk/media/webrtc/webrtcvoiceengine.h
index 2832fb31f3753de4eb1b66169ce627674973c4f4..c7eb42ea6ad418a87e75fecb53cb52433a69bc2f 100644
--- a/talk/media/webrtc/webrtcvoiceengine.h
+++ b/talk/media/webrtc/webrtcvoiceengine.h
@@ -108,6 +108,13 @@ class WebRtcVoiceEngine
   // Starts AEC dump using existing file.
   bool StartAecDump(rtc::PlatformFile file);
 
+  // Starts recording an RtcEventLog using an existing file until 10 minutes
+  // pass or the StopRtcEventLog function is called.
+  bool StartRtcEventLog(rtc::PlatformFile file);
+
+  // Stops recording the RtcEventLog.
+  void StopRtcEventLog();
+
   // Create a VoiceEngine Channel.
   int CreateMediaVoiceChannel();