Let WebRtcVideoChannel2::WebRtcVideoSendStream::InputFrame carry the input frame's timestamp to out…

talk/media/webrtc/fakewebrtccall.cc

Index: talk/media/webrtc/fakewebrtccall.cc
diff --git a/talk/media/webrtc/fakewebrtccall.cc b/talk/media/webrtc/fakewebrtccall.cc
index 9f6a0ff74092787ad10de25d46509cf1b346adcd..604eb1fe78b9c504e020243e2a7b1a23d619a21e 100644
--- a/talk/media/webrtc/fakewebrtccall.cc
+++ b/talk/media/webrtc/fakewebrtccall.cc
@@ -111,6 +111,13 @@ int FakeVideoSendStream::GetLastHeight() const {
   return last_frame_.height();
 }
 
+int64_t FakeVideoSendStream::GetLastTimestamp() const {
+  if (last_frame_.ntp_time_ms())
+    return last_frame_.ntp_time_ms();

[pbos-webrtc, 2015/07/12 15:30:22]

So long as we should never set NTP time, just DCHECK that ntp_time_ms() is zero.
Do that on IncomingCapturedFrame.

+  else
+    return last_frame_.render_time_ms();
+}
+
 void FakeVideoSendStream::IncomingCapturedFrame(
     const webrtc::VideoFrame& frame) {
   ++num_swapped_frames_;