[ServiceWorker] A cleanup in service_worker_context_client.cc.

The ToWebServiceWorkerRequest() is used only for dispatching fetch event
to service workers, and is not supposed to be used for other purposes
even in the future.

BUG=911930

Change-Id: Ie57f1b65c927ad3aed675b744135ed48f37df9b8
Reviewed-on: https://chromium-review.googlesource.com/c/1365074
Reviewed-by: Makoto Shimazu <shimazu@chromium.org>
Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Commit-Queue: Leon Han <leon.han@intel.com>
Cr-Commit-Position: refs/heads/master@{#614595}
1 file changed