Implement 'abs-send-time' extension in VideoSendStream.

BUG=2229
R=stefan@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/2184010

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@4727 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/video_engine/internal/video_send_stream.cc b/video_engine/internal/video_send_stream.cc
index 979631b..76d8bc3 100644
--- a/video_engine/internal/video_send_stream.cc
+++ b/video_engine/internal/video_send_stream.cc
@@ -112,6 +112,9 @@
     if (extension == "toffset") {
       if (rtp_rtcp_->SetSendTimestampOffsetStatus(channel_, true, id) != 0)
         abort();
+    } else if (extension == "abs-send-time") {
+      if (rtp_rtcp_->SetSendAbsoluteSendTimeStatus(channel_, true, id) != 0)
+        abort();
     } else {
       abort();  // Unsupported extension.
     }