Deprecate VideoDecoder::Reset() and remove calls.

webrtc/modules/video_coding/codecs/i420/i420.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 129 matching lines @@
     : _decodedImage(),
       _width(0),
       _height(0),
       _inited(false),
       _decodeCompleteCallback(NULL) {}
 
 I420Decoder::~I420Decoder() {
   Release();
 }
 
-int I420Decoder::Reset() {
-  return WEBRTC_VIDEO_CODEC_OK;
-}
-
 int I420Decoder::InitDecode(const VideoCodec* codecSettings,
                             int /*numberOfCores */) {
   if (codecSettings == NULL) {
     return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
   } else if (codecSettings->width < 1 || codecSettings->height < 1) {
     return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
   }
   _width = codecSettings->width;
   _height = codecSettings->height;
   _inited = true;
@@ skipping 68 matching lines @@
     DecodedImageCallback* callback) {
   _decodeCompleteCallback = callback;
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
 int I420Decoder::Release() {
   _inited = false;
   return WEBRTC_VIDEO_CODEC_OK;
 }
 }  // namespace webrtc