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

webrtc/api/BUILD.gn

Index: webrtc/api/BUILD.gn
diff --git a/webrtc/api/BUILD.gn b/webrtc/api/BUILD.gn
index 01aacb745928c2f1ed09e47a6e4dd577084b31ff..9b2325e875262f502f995830727a79b101a96262 100644
--- a/webrtc/api/BUILD.gn
+++ b/webrtc/api/BUILD.gn
@@ -341,6 +341,19 @@ rtc_source_set("audio_mixer_api") {
   ]
 }
 
+rtc_source_set("video_frame_api") {
+  sources = [
+    "video/rotation.h",

[pthatcher1, 2016/11/30 00:48:28]

We have video/video_x.h for everything else.  Wouldn't video/video_rotation.h be
more consistent?

[nisse-webrtc, 2016/11/30 11:26:03]

I'm renaming it video/video_rotation.h, for consistency. It defines the (enum)
type VideoRotation.

+    "video/video_frame.cc",
+    "video/video_frame.h",
+    "video/video_frame_buffer.h",
+  ]
+
+  deps = [
+    "../base:rtc_base_approved",
+  ]
+}
+
 if (rtc_include_tests) {
   config("peerconnection_unittests_config") {
     # The warnings below are enabled by default. Since GN orders compiler flags