GitLab

IsRunningAsSystemCompositor must return false, because input
should be disabled on ozone platform headless.

BUG=b:160309778
TEST=manual

Change-Id: I8a97b166b42a581a275c305355f0c4434e5adbbd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2276426Reviewed-by: Michael Spang <spang@chromium.org>
Reviewed-by: Denis Kuznetsov [CET] <antrim@chromium.org>
Commit-Queue: Polina Bondarenko <pbond@chromium.org>
Auto-Submit: Polina Bondarenko <pbond@chromium.org>
Cr-Commit-Position: refs/heads/master@{#786271}