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

webrtc/common_video/BUILD.gn

Index: webrtc/common_video/BUILD.gn
diff --git a/webrtc/common_video/BUILD.gn b/webrtc/common_video/BUILD.gn
index 0aefefd193b2014bca1f8d34757260423733c781..3b33bcca8d43de3455944b18483ff4cba30a23c8 100644
--- a/webrtc/common_video/BUILD.gn
+++ b/webrtc/common_video/BUILD.gn
@@ -60,12 +60,13 @@ rtc_static_library("common_video") {
     "../base:rtc_task_queue",
     "../system_wrappers",
   ]
+  public_deps = [
+    "../api:video_frame_api",
+  ]
 
   if (rtc_build_libyuv) {
     deps += [ "$rtc_libyuv_dir" ]
-    public_deps = [
-      "$rtc_libyuv_dir",
-    ]
+    public_deps += [ "$rtc_libyuv_dir" ]
   } else {
     # Need to add a directory normally exported by libyuv.
     include_dirs += [ "$rtc_libyuv_dir/include" ]