Update web-platform-tests to revision 8a2ceb5f18911302b7a5c1cd2791f4ab50ad4326

tests/wpt/web-platform-tests/background-fetch/content-security-policy.https.window.js

@@ -0,0 +1,20 @@
+// META: script=/service-workers/service-worker/resources/test-helpers.sub.js
+// META: script=resources/utils.js
+'use strict';
+
+// Tests that requests blocked by Content Security Policy are rejected.
+// https://w3c.github.io/webappsec-csp/#should-block-request
+
+// This is not a comprehensive test of Content Security Policy - it is just
+// intended to check that CSP checks are enabled.
+
+var meta = document.createElement('meta');
+meta.setAttribute('http-equiv', 'Content-Security-Policy');
+meta.setAttribute('content', "connect-src 'none'");
+document.head.appendChild(meta);
+
+backgroundFetchTest((t, bgFetch) => {
+  return promise_rejects(
+      t, new TypeError(),
+      bgFetch.fetch(uniqueTag(), 'https://example.com'));
+}, 'fetch blocked by CSP should reject');