Revert of Move MutableDataY{,U,V} methods to I420Buffer only.

webrtc/modules/video_coding/codecs/vp8/vp8_impl.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 1288 matching lines @@
 int VP8DecoderImpl::ReturnFrame(const vpx_image_t* img,
                                 uint32_t timestamp,
                                 int64_t ntp_time_ms) {
   if (img == NULL) {
     // Decoder OK and NULL image => No show frame
     return WEBRTC_VIDEO_CODEC_NO_OUTPUT;
   }
   last_frame_width_ = img->d_w;
   last_frame_height_ = img->d_h;
   // Allocate memory for decoded image.
-  rtc::scoped_refptr<I420Buffer> buffer =
-      buffer_pool_.CreateBuffer(img->d_w, img->d_h);
-
+  VideoFrame decoded_image(buffer_pool_.CreateBuffer(img->d_w, img->d_h),
+                           timestamp, 0, kVideoRotation_0);
   libyuv::I420Copy(img->planes[VPX_PLANE_Y], img->stride[VPX_PLANE_Y],
                    img->planes[VPX_PLANE_U], img->stride[VPX_PLANE_U],
                    img->planes[VPX_PLANE_V], img->stride[VPX_PLANE_V],
-                   buffer->MutableDataY(), buffer->StrideY(),
-                   buffer->MutableDataU(), buffer->StrideU(),
-                   buffer->MutableDataV(), buffer->StrideV(),
+                   decoded_image.video_frame_buffer()->MutableDataY(),
+                   decoded_image.video_frame_buffer()->StrideY(),
+                   decoded_image.video_frame_buffer()->MutableDataU(),
+                   decoded_image.video_frame_buffer()->StrideU(),
+                   decoded_image.video_frame_buffer()->MutableDataV(),
+                   decoded_image.video_frame_buffer()->StrideV(),
                    img->d_w, img->d_h);
-
-  VideoFrame decoded_image(buffer, timestamp, 0, kVideoRotation_0);
   decoded_image.set_ntp_time_ms(ntp_time_ms);
   int ret = decode_complete_callback_->Decoded(decoded_image);
   if (ret != 0)
     return ret;
 
   // Remember image format for later
   image_format_ = img->fmt;
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
@@ skipping 33 matching lines @@
     return -1;
   }
   if (vpx_codec_control(copy->decoder_, VP8_SET_REFERENCE, ref_frame_) !=
       VPX_CODEC_OK) {
     return -1;
   }
   return 0;
 }
 
 }  // namespace webrtc