This CL adds tests that are primarily targeting
VideoFrame.Buffer.toI420() and cropAndScale(), but includes the whole
chain for YuvConverter, GlRectDrawer, and VideoFrameDrawer.
It also includes a couple of fixes to bugs that were exposed by the new
tests.
Bug: webrtc:9186, webrtc:9391
Change-Id: I5eb62979a8fd8def28c3cb2e82dcede57c42216f
Reviewed-on: https://webrtc-review.googlesource.com/83163
Commit-Queue: Magnus Jedvert <magjed@webrtc.org>
Reviewed-by: Sami Kalliomäki <sakal@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23611}
6507054db1