Gardening: Mark crashing fullscreen related tests for gebug builds

This test have been consistently crashing in debug builds since earlier today.
Possible candidates to be blamed are chromium r261087 and/or r170638.

BUG=359067
TBR=miu@chromium.org,pdr@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/222023003

git-svn-id: svn://svn.chromium.org/blink/trunk@170654 bbb929c8-8fbe-4397-9dbb-9b2b20218538