duplicate I420Rect prototype into convert for webrtc

include/libyuv/convert.h

 /*
  *  Copyright 2011 The LibYuv 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 167 matching lines @@
                    int width, int height);
 
 // RGB12 (R444 fourcc) little endian to I420.
 LIBYUV_API
 int ARGB4444ToI420(const uint8* src_frame, int src_stride_frame,
                    uint8* dst_y, int dst_stride_y,
                    uint8* dst_u, int dst_stride_u,
                    uint8* dst_v, int dst_stride_v,
                    int width, int height);
 
+// Draw a rectangle into I420.
+// TODO(fbarchard): add planar_functions.h to webrtc includes
+// https://bugs.chromium.org/p/libyuv/issues/detail?id=618
+LIBYUV_API
+int I420Rect(uint8* dst_y, int dst_stride_y,
+             uint8* dst_u, int dst_stride_u,
+             uint8* dst_v, int dst_stride_v,
+             int x, int y, int width, int height,
+             int value_y, int value_u, int value_v);
+
 #ifdef HAVE_JPEG
 // src_width/height provided by capture.
 // dst_width/height for clipping determine final size.
 LIBYUV_API
 int MJPGToI420(const uint8* sample, size_t sample_size,
                uint8* dst_y, int dst_stride_y,
                uint8* dst_u, int dst_stride_u,
                uint8* dst_v, int dst_stride_v,
                int src_width, int src_height,
                int dst_width, int dst_height);
@@ skipping 36 matching lines @@
                   int crop_width, int crop_height,
                   enum RotationMode rotation,
                   uint32 format);
 
 #ifdef __cplusplus
 }  // extern "C"
 }  // namespace libyuv
 #endif
 
 #endif  // INCLUDE_LIBYUV_CONVERT_H_  NOLINT