Add QP sum stats for received streams.

webrtc/modules/video_coding/test/test_util.cc

Index: webrtc/modules/video_coding/test/test_util.cc
diff --git a/webrtc/modules/video_coding/test/test_util.cc b/webrtc/modules/video_coding/test/test_util.cc
index 8f5c55f9ba439ae126d4fc7851c39a9e6e406cf8..386b4300a96a6c9c4226a380484243290ec95ccd 100644
--- a/webrtc/modules/video_coding/test/test_util.cc
+++ b/webrtc/modules/video_coding/test/test_util.cc
@@ -97,8 +97,8 @@ FileOutputFrameReceiver::~FileOutputFrameReceiver() {
   }
 }
 
-int32_t FileOutputFrameReceiver::FrameToRender(
-    webrtc::VideoFrame& video_frame) {
+int32_t FileOutputFrameReceiver::FrameToRender(webrtc::VideoFrame& video_frame,
+                                               rtc::Optional<uint8_t> qp) {
   if (timing_file_ == NULL) {
     std::string basename;
     std::string extension;