Remove unused kHideIncorrectlySizedFullscreenFrames feature flag

Bug: 977452
Change-Id: I5ed7e10988f45e648d582914b173878e4ad19c7b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1673649
Reviewed-by: Antoine Labour <piman@chromium.org>
Reviewed-by: Khushal <khushalsagar@chromium.org>
Commit-Queue: Tommy Steimel <steimel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#671816}
3 files changed