Increase MAX_CUSTOM_DELAY to 5 minutes

Rialto will soon need a longer dev mode delay, this variable would prevent it.

BUG=chrome-os-partner:48657
TEST=See follow up CLs
BRANCH=master

Change-Id: Ie5ada9c5441b5b042bd0801d66559ab715fbbf47
Signed-off-by: Alexandru M Stan <amstan@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/323832
Commit-Ready: Alexandru Stan <amstan@chromium.org>
Tested-by: Alexandru Stan <amstan@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
1 file changed