Revert of Cleanups in cricket::VideoFrame and cricket::WebRtcVideoFrame. (patchset #5 id:110001 of https://codereview.webrtc.org/2075983003/ )

Reason for revert:
Breaking Chrome FYI bots.

Original issue's description:
> Cleanups in cricket::VideoFrame and cricket::WebRtcVideoFrame.
>
> Removed some protected virtual methods from VideoFrame that no longer
> need to exist. Some minor cleanups in the tests.
>
> BUG=webrtc:5682
>
> Committed: https://crrev.com/742d7b10b9720ec43de26e0faef52e5cb9c0daa8
> Cr-Commit-Position: refs/heads/master@{#13275}

TBR=pbos@webrtc.org,nisse@webrtc.org,deadbeef@webrtc.org,sergeyu@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:5682

Review-Url: https://codereview.webrtc.org/2091983002
Cr-Original-Commit-Position: refs/heads/master@{#13277}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 7cf740323033b50845eed0ffe1e9802ae327cd8b
5 files changed