Add QP sum stats for received streams.

webrtc/modules/video_coding/include/video_coding_defines.h

Index: webrtc/modules/video_coding/include/video_coding_defines.h
diff --git a/webrtc/modules/video_coding/include/video_coding_defines.h b/webrtc/modules/video_coding/include/video_coding_defines.h
index 122ddc6315c5b85a3a5ac5c7cd4654ecb6cc6880..5f472d2b3002703cfbf4ea9ae031eb9b15e14690 100644
--- a/webrtc/modules/video_coding/include/video_coding_defines.h
+++ b/webrtc/modules/video_coding/include/video_coding_defines.h
@@ -63,7 +63,7 @@ struct VCMFrameCount {
 // rendered.
 class VCMReceiveCallback {
  public:
-  virtual int32_t FrameToRender(VideoFrame& videoFrame) = 0;  // NOLINT
+  virtual int32_t FrameToRender(VideoFrame& videoFrame, int qp) = 0;  // NOLINT
   virtual int32_t ReceivedDecodedReferenceFrame(const uint64_t pictureId) {
     return -1;
   }