Revert of Delete deprecated and transitional stuff related to video frame refactoring.

webrtc/api/video/i420_buffer.cc

 /*
  *  Copyright (c) 2015 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.
  */
 #include "webrtc/api/video/i420_buffer.h"
@@ skipping 113 matching lines @@
       src.DataU(), src.StrideU(),
       src.DataV(), src.StrideV(),
       buffer->MutableDataY(), buffer->StrideY(), buffer->MutableDataU(),
       buffer->StrideU(), buffer->MutableDataV(), buffer->StrideV(),
       src.width(), src.height(),
       static_cast<libyuv::RotationMode>(rotation)));
 
   return buffer;
 }
 
+// static
+rtc::scoped_refptr<VideoFrameBuffer> I420Buffer::Rotate(
+    rtc::scoped_refptr<VideoFrameBuffer> src,
+    VideoRotation rotation) {
+  if (rotation == webrtc::kVideoRotation_0) {
+    return src;
+  } else {
+    return Rotate(*src, rotation);
+  }
+}
+
 void I420Buffer::InitializeData() {
   memset(data_.get(), 0,
          I420DataSize(height_, stride_y_, stride_u_, stride_v_));
 }
 
 int I420Buffer::width() const {
   return width_;
 }
 
 int I420Buffer::height() const {
@@ skipping 95 matching lines @@
       src,
       (src.width() - crop_width) / 2, (src.height() - crop_height) / 2,
       crop_width, crop_height);
 }
 
 void I420Buffer::ScaleFrom(const VideoFrameBuffer& src) {
   CropAndScaleFrom(src, 0, 0, src.width(), src.height());
 }
 
 }  // namespace webrtc