Captured video frames may need to be rotated for display.
<rdar://problem/30994785>
Created attachment 304815 [details] Proposed patch.
Created attachment 304822 [details] Patch for landing.
Comment on attachment 304822 [details] Patch for landing. Clearing flags on attachment: 304822 Committed r214120: <http://trac.webkit.org/changeset/214120>
Plus r214130 to fix a crash found by the bots.