[ServiceWorker] Move service_worker_installed_scripts_manager.mojom into WebKit/common/

This CL moves service_worker_installed_scripts_manager.mojom from
content/common/service_worker/ into
third_party/WebKit/common/service_worker/, in preparation to merge
content::WebServiceWorkerInstalledScriptsManagerImpl into Blink.

BUG=789854,789846

Change-Id: Ice64bb4ad56602370fc14fa6cd21fd124d454a42
Reviewed-on: https://chromium-review.googlesource.com/807761
Commit-Queue: Han Leon <leon.han@intel.com>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Makoto Shimazu <shimazu@chromium.org>
Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#521981}
24 files changed