ServiceWorker

c92c1485 - Changing useCache boolean to updateViaCache enum (#1107)

Changing useCache boolean to updateViaCache enum (#1107) Changing useCache boolean to updateViaCache enum Issue: https://github.com/w3c/ServiceWorker/issues/1104. Tests: https://github.com/w3c/web-platform-tests/pull/5515. HTML change: https://github.com/whatwg/html/commit/b5fcec0fa105de2dd3c3aeeb7ea5c630a7bf5024.