chromeos-chrome: bump size check

Chrome binary sizes have approached 250MB already on amd64 based
platforms. volteer went through the check but it isn't the only one.

BUG=b:221881366
TEST=CQ

Change-Id: Id952fb123bdc2e8c93fa20b0838968bd93b75a69
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/chromiumos-overlay/+/3494918
Tested-by: Ilja Friedel <ihf@chromium.org>
Reviewed-by: Miguel Casas <mcasas@google.com>
Commit-Queue: Ilja Friedel <ihf@chromium.org>
Reviewed-by: Toby Huang <tobyhuang@chromium.org>
1 file changed