Move VideoFrame and related declarations to webrtc/api/video.

webrtc/common_video/libyuv/webrtc_libyuv.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.
  */
 
 #include "webrtc/common_video/libyuv/include/webrtc_libyuv.h"
 
 #include <assert.h>
 #include <string.h>
 
 // NOTE(ajm): Path provided by gyp.

[the sun, 2016/11/24 10:36:59]

This comment is wrong

[nisse-webrtc, 2016/11/25 08:58:02]

Edited s/gyp/gn/.

BTW, I don't quite like the special handling of libyuv include paths in the
build files. It's needed for two reasons:

1. Internal includes of libyuv require it (which I find wrong, but we couldn't
reach agreement to land the fix in https://codereview.chromium.org/1977813002/).

2. We might want to support building webrtc with an out-of-tree libyuv, e.g.,
with headers installed in /usr/include.

 #include "libyuv.h"  // NOLINT
 
+// TODO(nisse): Only needed for the deprecated ConvertToI420.
+#include "webrtc/common_video/include/video_frame_buffer.h"
+
 namespace webrtc {
 
 VideoType RawVideoTypeToCommonVideoVideoType(RawVideoType type) {
   switch (type) {
     case kVideoI420:
       return kI420;
     case kVideoIYUV:
       return kIYUV;
     case kVideoRGB24:
       return kRGB24;
@@ skipping 412 matching lines @@
                     src_v, src_uv_width,
                     src_width, src_height,
                     dst_y, dst_stride_y,
                     dst_u, dst_stride_u,
                     dst_v, dst_stride_v,
                     dst_width, dst_height,
                     libyuv::kFilterBox);
 }
 
 }  // namespace webrtc