Add new dependency on targets that use i420_buffer.h

WebRTC api:video_frame_api is splitting into two targets, and all
targets that include i420_buffer.h must depend on a new target
api:video_frame_api_i420. This CL fixes that for Chromium.

Bug: webrtc:7504
Change-Id: Ic383a5592a5b01a4463565326fe4fecd2fc96829
Reviewed-on: https://chromium-review.googlesource.com/776715
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Tommi <tommi@chromium.org>
Commit-Queue: Patrik Höglund <phoglund@chromium.org>
Cr-Commit-Position: refs/heads/master@{#517848}
2 files changed