Allow range requests to pass through a service worker

This change implements the following edit to the Fetch spec:
whatwg/fetch#560

Existing web tests cover the new functionality.

Bug: 847428
Change-Id: Ie63704769e99d4b8d26d8903edf4cc4e3466c124

Author: naarcini

fetch/range/sw.https.window.js

@@ -86,11 +86,11 @@ promise_test(async t => {
 
   // Fetching should reject
   const fetchPromise = w.fetch('?action=use-stored-ranged-response', { mode: 'no-cors' });
-  promise_rejects_js(t, TypeError, fetchPromise);
+  await promise_rejects_js(t, w.TypeError, fetchPromise);
 
   // Script loading should error too
   const loadScriptPromise = loadScript('?action=use-stored-ranged-response', { doc: w.document });
-  promise_rejects_js(t, Error, loadScriptPromise);
+  await promise_rejects_js(t, Error, loadScriptPromise);
 
   await loadScriptPromise.catch(() => {});