This reverts commit 12e5d392cc8fc0ba7a04587c190daa4232e412bb.
Reason for revert: Partial Capture API is not needed, according to new info from the Chrome team.
Original change's description:
> Reland "Partial frame capture API part 1"
>
> Reland with fixes to undefined behavior.
>
> Define new optional struct in VideoFrame to signal that the frame is a
> changed part of a whole picture and add a flag to signal that partial
> update may be issued by the VideoFrame source.
>
> Also, fix too strict assumptions in FrameBuffers PasteFrom methods.
> Also, add ability to set a new buffer in video frame.
>
> Original Reviewed-on: https://webrtc-review.googlesource.com/c/120405
>
> Bug: webrtc:10152
> Change-Id: I85790dfc7cec2f23abfe9d6cd18dc76a0c343bc0
> Reviewed-on: https://webrtc-review.googlesource.com/c/120780
> Reviewed-by: Niels Moller <nisse@webrtc.org>
> Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
> Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#26493}
TBR=ilnik@webrtc.org,nisse@webrtc.org,sprang@webrtc.org
# Not skipping CQ checks because original CL landed > 1 day ago.
Bug: webrtc:10152
Change-Id: I1c1dd51a8b5a09f743f212336beb01447f60f26e
Reviewed-on: https://webrtc-review.googlesource.com/c/122092
Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
Reviewed-by: Niels Moller <nisse@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26638}
871e144132