S13nServiceWorker: Skip InitializeHandler tests

As a comment in ServiceWorkerRequestHandler::InitializeHandler()
says[1], we may call it but do nothing when S13nServiceWorker
is enabled. Skip tests for InitializeHandler() when S13nServiceWorker
is enabled.

[1] https://cs.chromium.org/chromium/src/content/browser/service_worker/service_worker_request_handler.cc?l=232&rcl=e09f67110c9a517c981814b643b69c8de0833aac

Bug: 860361
Change-Id: I55afa47c165c33d82b38e9e2b89b153ff8aaffb2
Reviewed-on: https://chromium-review.googlesource.com/1144580
Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Commit-Queue: Kenichi Ishibashi <bashi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576753}
1 file changed