Add content type information to encoded images and corresponding rtp extension header

webrtc/modules/video_coding/codecs/test/videoprocessor.cc

Index: webrtc/modules/video_coding/codecs/test/videoprocessor.cc
diff --git a/webrtc/modules/video_coding/codecs/test/videoprocessor.cc b/webrtc/modules/video_coding/codecs/test/videoprocessor.cc
index 0bb04a99df03d7a193411ab829832e3092343e1a..5ad4e32e3049b0915292d0d6077705244b298d01 100644
--- a/webrtc/modules/video_coding/codecs/test/videoprocessor.cc
+++ b/webrtc/modules/video_coding/codecs/test/videoprocessor.cc
@@ -260,7 +260,8 @@ bool VideoProcessorImpl::ProcessFrame(int frame_number) {
   }
 
   uint32_t timestamp = FrameNumberToTimestamp(frame_number);
-  VideoFrame source_frame(buffer, timestamp, 0, webrtc::kVideoRotation_0);
+  VideoFrame source_frame(buffer, timestamp, 0, webrtc::kVideoRotation_0,
+                          webrtc::VideoContentType::kDefault);
 
   // Store frame information during the different stages of encode and decode.
   frame_infos_.emplace_back();