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

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

Index: webrtc/modules/video_coding/codecs/test/video_codec_test.cc
diff --git a/webrtc/modules/video_coding/codecs/test/video_codec_test.cc b/webrtc/modules/video_coding/codecs/test/video_codec_test.cc
index d0d86ce4d7a308b58c3283034f11ff7076c146f2..c4bf44172d2837b1ffb414ba45eac19bab9ded81 100644
--- a/webrtc/modules/video_coding/codecs/test/video_codec_test.cc
+++ b/webrtc/modules/video_coding/codecs/test/video_codec_test.cc
@@ -54,7 +54,8 @@ void VideoCodecTest::SetUp() {
   ASSERT_TRUE(source_file_ != NULL);
   rtc::scoped_refptr<VideoFrameBuffer> video_frame_buffer(
       test::ReadI420Buffer(kWidth, kHeight, source_file_));
-  input_frame_.reset(new VideoFrame(video_frame_buffer, kVideoRotation_0, 0));
+  input_frame_.reset(new VideoFrame(video_frame_buffer, kVideoRotation_0,
+                                    kVideoContent_Default, 0));
   fclose(source_file_);
 
   encoder_.reset(CreateEncoder());