GitLab

Fullscreen VK was abandoned a long time ago. It seems unlikely to make
a comeback. Let's just delete the dead code.

TBR=benwells@chromium.org

Bug: 845780
Change-Id: I1a31739c21948cc046caa9e8175e28508fe1f489
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1611625
Commit-Queue: Darren Shen <shend@chromium.org>
Reviewed-by: Yuichiro Hanada <yhanada@chromium.org>
Reviewed-by: Oliver Chang <ochang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#661236}