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

talk/app/webrtc/peerconnectioninterface.h

Index: talk/app/webrtc/peerconnectioninterface.h
diff --git a/talk/app/webrtc/peerconnectioninterface.h b/talk/app/webrtc/peerconnectioninterface.h
index d3d0d9e66710d8a97cdf3b24529c2f3ac8c59085..f61f2f6c5c10a5629e3647ce76a374f67448af23 100644
--- a/talk/app/webrtc/peerconnectioninterface.h
+++ b/talk/app/webrtc/peerconnectioninterface.h
@@ -619,6 +619,22 @@ class PeerConnectionFactoryInterface : public rtc::RefCountInterface {
   // http://crbug.com/264611.
   virtual bool StartAecDump(rtc::PlatformFile file) = 0;
 
+  // Starts RtcEventLog using existing file. Takes ownership of |file| and
+  // passes it on to VoiceEngine, which will take the ownership. If the
+  // operation fails the file will be closed. The logging will stop
+  // automatically after 10 minutes have passed, or when the StopRtcEventLog
+  // function is called.
+  // This function as well as the StopRtcEventLog don't really belong on this
+  // interface, this is a temporary solution until we move the logging object
+  // from inside voice engine to webrtc::Call, which will happen when the VoE
+  // restructuring effort is further along.
+  // TODO(ivoc): Move this into being:
+  //             PeerConnection => MediaController => webrtc::Call.
+  virtual bool StartRtcEventLog(rtc::PlatformFile file) = 0;
+
+  // Stops logging the RtcEventLog.
+  virtual void StopRtcEventLog() = 0;
+
  protected:
   // Dtor and ctor protected as objects shouldn't be created or deleted via
   // this interface.