Removing prefixMatch attribute of CacheQueryOptions.

As get removed in latest specs, removing it.
spec: https://slightlyoff.github.io/ServiceWorker/spec/service_worker/#cache-query-options-dictionary

PATCH 1: Chromium: [THIS PATCH]
PATCH 2: Blink: https://codereview.chromium.org/927723003/

BUG=462837

Review URL: https://codereview.chromium.org/941683002

Cr-Commit-Position: refs/heads/master@{#318842}
4 files changed