New gn target video_frame_api.

webrtc/api/BUILD.gn

 # 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.
 
 import("../build/webrtc.gni")
 if (is_android) {
@@ skipping 350 matching lines @@
   deps = [
     "../base:rtc_base_approved",
   ]
 }
 
 rtc_source_set("transport_api") {
   sources = [
     "call/transport.h",
   ]
 }
+
+rtc_source_set("video_frame_api") {
+  sources = [
+    "video/video_rotation.h",
+  ]
+
+  deps = [
+    "../base:rtc_base_approved",
+  ]
+
+  # TODO(nisse): This logic is duplicated in multiple places.
+  # Define in a single place.
+  if (rtc_build_libyuv) {
+    deps += [ "$rtc_libyuv_dir" ]

[kjellander_webrtc, 2016/12/02 10:09:00]

I tried gathering it in one place at some point (common_video I believe).
I think it was not possible to just put it into a config for some reason, but
I'm sure there is a way to do it better than now (I just never looked more into
it).

+    public_deps = [
+      "$rtc_libyuv_dir",
+    ]
+  } else {
+    # Need to add a directory normally exported by libyuv.
+    include_dirs = [ "$rtc_libyuv_dir/include" ]
+  }
+}
+
 if (rtc_include_tests) {
   config("peerconnection_unittests_config") {
     # The warnings below are enabled by default. Since GN orders compiler flags
     # for a target before flags from configs, the only way to disable such
     # warnings is by having them in a separate config, loaded from the target.
     # TODO(kjellander): Make the code compile without disabling these flags.
     # See https://bugs.webrtc.org/3307.
     if (is_clang && is_win) {
       cflags = [
         # See https://bugs.chromium.org/p/webrtc/issues/detail?id=6267
@@ skipping 118 matching lines @@
 
     public_deps = [
       ":audio_mixer_api",
     ]
 
     deps = [
       "//testing/gmock",
     ]
   }
 }