Chris Dziemborowicz 048805e821 Make it possible to clear the VideoFormat set on VideoAdapter by making VideoAdapter::OnOutputFormatRequest take an rtc::Optional
Bug: webrtc:8966
Change-Id: Ia58e63f074ea7d21d54e12adfcebb78778cca1ca
Reviewed-on: https://webrtc-review.googlesource.com/59300
Reviewed-by: Magnus Jedvert <magjed@webrtc.org>
Commit-Queue: Chris Dziemborowicz <chrisdz@google.com>
Cr-Commit-Position: refs/heads/master@{#22266}
2018-03-02 12:43:09 +00:00
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