Move webrtc/video_frame to common_video/include.

BUG=webrtc:7616

Review-Url: https://codereview.webrtc.org/2877703002
Cr-Original-Commit-Position: refs/heads/master@{#18147}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: ea3a7987d247c2b63ada71b9e3ac076e2e10f387
23 files changed