Get VideoCapturer stats via VideoTrackSourceInterface in StatsCollector,

webrtc/media/engine/webrtcvideoengine2.cc

Index: webrtc/media/engine/webrtcvideoengine2.cc
diff --git a/webrtc/media/engine/webrtcvideoengine2.cc b/webrtc/media/engine/webrtcvideoengine2.cc
index b977521f9eb4627341b85b070ad54c3a15521d9b..41faf70587d5f500ad5f0f3e1d6edec29c43777c 100644
--- a/webrtc/media/engine/webrtcvideoengine2.cc
+++ b/webrtc/media/engine/webrtcvideoengine2.cc
@@ -2089,13 +2089,6 @@ WebRtcVideoChannel2::WebRtcVideoSendStream::GetVideoSenderInfo() {
                           ? CoordinatedVideoAdapter::ADAPTREASON_NONE
                           : CoordinatedVideoAdapter::ADAPTREASON_CPU;
 
-  if (capturer_) {
-      VideoFormat last_captured_frame_format;
-      capturer_->GetStats(&last_captured_frame_format);
-      info.input_frame_width = last_captured_frame_format.width;
-      info.input_frame_height = last_captured_frame_format.height;
-  }
-
   // Get bandwidth limitation info from stream_->GetStats().
   // Input resolution (output from video_adapter) can be further scaled down or
   // higher video layer(s) can be dropped due to bitrate constraints.