Report timing frames info in GetStats.

webrtc/media/engine/fakewebrtccall.cc

Index: webrtc/media/engine/fakewebrtccall.cc
diff --git a/webrtc/media/engine/fakewebrtccall.cc b/webrtc/media/engine/fakewebrtccall.cc
index ec8f6b8f160c137fd61a498e96a996f8d04fe212..b28adb09f018a05ea176486e2492aedce4ca03ab 100644
--- a/webrtc/media/engine/fakewebrtccall.cc
+++ b/webrtc/media/engine/fakewebrtccall.cc
@@ -309,6 +309,11 @@ webrtc::VideoReceiveStream::Stats FakeVideoReceiveStream::GetStats() const {
   return stats_;
 }
 
+rtc::Optional<webrtc::TimingFrameInfo>
+FakeVideoReceiveStream::GetTimingFrameInfo() {
+  return rtc::Optional<webrtc::TimingFrameInfo>();
+}
+
 void FakeVideoReceiveStream::Start() {
   receiving_ = true;
 }