Media controls - Hide popup menu when exiting fullscreen

Previously when exiting fullscreen we might adjust the scroll offset. We
no longer do that so a kScroll event isn't dispatched to hide the
popup menu. Hide the popup menu in the fullscreen exited event.

BUG=941979

Change-Id: I8a14a6732d836702f0da8b2608603d2fc726f80e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1524871
Reviewed-by: Tommy Steimel <steimel@chromium.org>
Commit-Queue: Dave Tapuska <dtapuska@chromium.org>
Cr-Commit-Position: refs/heads/master@{#641711}
1 file changed