New peerconnection test case, for video stream forwarding.

webrtc/media/engine/webrtcvideoengine2.cc

Index: webrtc/media/engine/webrtcvideoengine2.cc
diff --git a/webrtc/media/engine/webrtcvideoengine2.cc b/webrtc/media/engine/webrtcvideoengine2.cc
index fc87607d20a6d0259d4a69c8f64b0b0cf6313a1e..69917c338bfdd9ec834f675f8688035e482f5aae 100644
--- a/webrtc/media/engine/webrtcvideoengine2.cc
+++ b/webrtc/media/engine/webrtcvideoengine2.cc
@@ -1562,15 +1562,24 @@ static void CreateBlackFrame(webrtc::VideoFrame* video_frame,
 void WebRtcVideoChannel2::WebRtcVideoSendStream::OnFrame(
     const VideoFrame& frame) {
   TRACE_EVENT0("webrtc", "WebRtcVideoSendStream::OnFrame");
-  webrtc::VideoFrame video_frame(frame.GetVideoFrameBuffer(), 0, 0,
-                                 frame.GetVideoRotation());
+  invoker_.AsyncInvoke<void>(

[pbos-webrtc, 2016/04/08 14:08:56]

I really don't want a thread hop here, I've CLs that should get rid of the
requirement to run this on the worker thread that need to be relanded (hopefully
early next week). Can we wait until that?

I'm also a bit afraid that this invoke call could outlive this object (frame ->
destroy stream -> invoke happens).

[perkj_webrtc, 2016/04/08 14:34:07]

This can wait until then.... 

[nisse-webrtc, 2016/04/08 14:57:03]

Agreed.

[nisse-webrtc, 2016/04/11 06:35:39]

Can you cc me on that cl?

+      worker_thread_,
+      rtc::Bind(&WebRtcVideoChannel2::WebRtcVideoSendStream::OnFrame_w,
+                this,
+                webrtc::VideoFrame(frame.GetVideoFrameBuffer(), 0, 0,
+                                   frame.GetVideoRotation()),
+                frame.GetTimeStamp() / rtc::kNumNanosecsPerMillisec));
+}
+
+void WebRtcVideoChannel2::WebRtcVideoSendStream::OnFrame_w(
+    webrtc::VideoFrame video_frame, int64_t frame_delta_ms) {
+  RTC_DCHECK(worker_thread_->IsCurrent());
   rtc::CritScope cs(&lock_);
   if (stream_ == NULL) {
     // Frame input before send codecs are configured, dropping frame.
     return;
   }
 
-  int64_t frame_delta_ms = frame.GetTimeStamp() / rtc::kNumNanosecsPerMillisec;
   // frame->GetTimeStamp() is essentially a delta, align to webrtc time
   if (first_frame_timestamp_ms_ == 0) {
     first_frame_timestamp_ms_ = rtc::Time() - frame_delta_ms;