Oilpan: fix build after r172658.

DOMExceptions aren't yet on the Oilpan heap; adjust transition types
accordingly in ServiceWorkerError.

R=
BUG=340522

Review URL: https://codereview.chromium.org/250883005

git-svn-id: svn://svn.chromium.org/blink/trunk@172676 bbb929c8-8fbe-4397-9dbb-9b2b20218538