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

webrtc/media/engine/webrtcvideoframe.cc

 /*
  *  Copyright (c) 2011 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 111 matching lines @@
   // Set up a new buffer.
   // TODO(fbarchard): Support lazy allocation.
   int new_width = dw;
   int new_height = dh;
   // If rotated swap width, height.
   if (apply_rotation && (rotation == 90 || rotation == 270)) {
     new_width = dh;
     new_height = dw;
   }
 
-  InitToEmptyBuffer(new_width, new_height);
+  rtc::scoped_refptr<webrtc::I420Buffer> buffer =
+      webrtc::I420Buffer::Create(new_width, new_height);
+  video_frame_buffer_ = buffer;
   rotation_ = apply_rotation ? webrtc::kVideoRotation_0 : rotation;
 
   int horiz_crop = ((w - dw) / 2) & ~1;
   // ARGB on Windows has negative height.
   // The sample's layout in memory is normal, so just correct crop.
   int vert_crop = ((abs(h) - dh) / 2) & ~1;
   // Conversion functions expect negative height to flip the image.
   int idh = (h < 0) ? -dh : dh;
   int r = libyuv::ConvertToI420(
       sample, sample_size,
-      video_frame_buffer_->MutableDataY(),
-      video_frame_buffer_->StrideY(),
-      video_frame_buffer_->MutableDataU(),
-      video_frame_buffer_->StrideU(),
-      video_frame_buffer_->MutableDataV(),
-      video_frame_buffer_->StrideV(),
-      horiz_crop, vert_crop,
-      w, h,
-      dw, idh,
+      buffer->MutableDataY(), buffer->StrideY(),
+      buffer->MutableDataU(), buffer->StrideU(),
+      buffer->MutableDataV(), buffer->StrideV(),
+      horiz_crop, vert_crop, w, h, dw, idh,
       static_cast<libyuv::RotationMode>(
           apply_rotation ? rotation : webrtc::kVideoRotation_0),
       format);
   if (r) {
     LOG(LS_ERROR) << "Error parsing format: " << GetFourccName(format)
                   << " return code : " << r;
     return false;
   }
   timestamp_us_ = timestamp_us;
   return true;
 }
 
 void WebRtcVideoFrame::InitToEmptyBuffer(int w, int h) {
-  video_frame_buffer_ = new rtc::RefCountedObject<webrtc::I420Buffer>(w, h);
+  video_frame_buffer_ = webrtc::I420Buffer::Create(w, h);
   rotation_ = webrtc::kVideoRotation_0;
 }
 
 }  // namespace cricket