Make cricket::VideoFrame inherit webrtc::VideoFrame. Delete
all methods but a few constructors. And similarly for the
subclass cricket::WebRtcVideoFrame.

TBR=tkchin@webrtc.org  # Added an include line
BUG=webrtc:5682

Review-Url: https://codereview.webrtc.org/2315663002
Cr-Original-Commit-Position: refs/heads/master@{#14576}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: dda6ec008a0fc8d52e118814fb779032e8931968
14 files changed