Remove dead code in vp8_impl files.

webrtc/common_types.h

Index: webrtc/common_types.h
diff --git a/webrtc/common_types.h b/webrtc/common_types.h
index b80635ff8eac288d33008c8cace240a8c1b73bc0..e97e4679c887d454116ce700ef3e3b0a6b08d986 100644
--- a/webrtc/common_types.h
+++ b/webrtc/common_types.h
@@ -524,7 +524,6 @@ class TemporalLayersFactory;
 // VP8 specific
 struct VideoCodecVP8 {
   bool pictureLossIndicationOn;
-  bool feedbackModeOn;

[brandtr, 2017/03/17 08:26:13]

Need to update in Chromium too:
https://cs.chromium.org/chromium/src/content/renderer/media/gpu/rtc_video_dec...
https://cs.chromium.org/chromium/src/content/renderer/media/gpu/rtc_video_dec...

[nisse-webrtc, 2017/03/17 08:54:48]

My plan was to first delete all use of this variable, then drop it in chrome,
and finally delete it here. pictureLossIndicationOn is also unused, and could be
deleted in chromium right away, and then deleted here.

[pbos-webrtc, 2017/03/17 17:48:55]

Thanks, removing in https://codereview.chromium.org/2757913002/.

[pbos-webrtc, 2017/03/17 17:48:55]

Ack, can do that separately though.

   VideoCodecComplexity complexity;
   VP8ResilienceMode resilience;
   unsigned char numberOfTemporalLayers;