Use vcm::VideoSender in ViEEncoder.

webrtc/video/video_send_stream.h

Index: webrtc/video/video_send_stream.h
diff --git a/webrtc/video/video_send_stream.h b/webrtc/video/video_send_stream.h
index e52106cefd1ae2601c9573696e38789b7ae4b542..ad438ae0cb47580a7a3cba1d346b8965372e81ec 100644
--- a/webrtc/video/video_send_stream.h
+++ b/webrtc/video/video_send_stream.h
@@ -39,6 +39,10 @@ class ViEChannel;
 class ViEEncoder;
 class VieRemb;
 
+namespace vcm {
+class VideoSender;
+}  // namespace vcm
+
 namespace internal {
 
 class VideoSendStream : public webrtc::VideoSendStream,
@@ -122,7 +126,7 @@ class VideoSendStream : public webrtc::VideoSendStream,
   OveruseFrameDetector overuse_detector_;
   EncoderStateFeedback encoder_feedback_;
   ViEEncoder vie_encoder_;
-  VideoCodingModule* const vcm_;
+  vcm::VideoSender* const video_sender_;
 
   const std::unique_ptr<RtcpBandwidthObserver> bandwidth_observer_;
   // RtpRtcp modules, declared here as they use other members on construction.