Add a check on regular expression check.

BUG=None
TEST=None

Change-Id: I459dc2c3b2e7ee5ff24c1b27bb31121cdace75c6
(cherry picked from commit cbbf69c198f75b56fcb00aaa4b2c13cc000b6ab9)
Reviewed-on: https://chromium-review.googlesource.com/210395
Reviewed-by: Dharani Govindan <dharani@chromium.org>
Tested-by: Dharani Govindan <dharani@chromium.org>
1 file changed