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

webrtc/api/video/i420_buffer.h

 /*
  *  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.
  */
 
@@ skipping 35 matching lines @@
   static void SetBlack(I420Buffer* buffer);
 
   // Sets all three planes to all zeros. Used to work around for
   // quirks in memory checkers
   // (https://bugs.chromium.org/p/libyuv/issues/detail?id=377) and
   // ffmpeg (http://crbug.com/390941).
   // TODO(nisse): Deprecated. Should be deleted if/when those issues
   // are resolved in a better way. Or in the mean time, use SetBlack.
   void InitializeData();
 
+  // TODO(nisse): Deprecated, use static method instead.
+  void SetToBlack() { SetBlack(this); }
+
   int width() const override;
   int height() const override;
   const uint8_t* DataY() const override;
   const uint8_t* DataU() const override;
   const uint8_t* DataV() const override;
 
   int StrideY() const override;
   int StrideU() const override;
   int StrideV() const override;
 
@@ skipping 12 matching lines @@
                         int crop_width,
                         int crop_height);
 
   // The common case of a center crop, when needed to adjust the
   // aspect ratio without distorting the image.
   void CropAndScaleFrom(const VideoFrameBuffer& src);
 
   // Scale all of |src| to the size of |this| buffer, with no cropping.
   void ScaleFrom(const VideoFrameBuffer& src);
 
+  // TODO(nisse): Deprecated, delete once downstream applications are updated.
+  // Returns a rotated versions of |src|. Native buffers are not
+  // supported. The reason this function doesn't return an I420Buffer,
+  // is that it returns |src| unchanged in case |rotation| is zero.
+  static rtc::scoped_refptr<VideoFrameBuffer> Rotate(
+      rtc::scoped_refptr<VideoFrameBuffer> src,
+      VideoRotation rotation);
+
  protected:
   I420Buffer(int width, int height);
   I420Buffer(int width, int height, int stride_y, int stride_u, int stride_v);
 
   ~I420Buffer() override;
 
  private:
   const int width_;
   const int height_;
   const int stride_y_;
   const int stride_u_;
   const int stride_v_;
   const std::unique_ptr<uint8_t, AlignedFreeDeleter> data_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_API_VIDEO_I420_BUFFER_H_