Support ReferrerPolicy in Fetch API

third_party/WebKit/LayoutTests/http/tests/fetch/script-tests/referrer.js

 'use strict';
 if (self.importScripts) {
   importScripts('/fetch/resources/fetch-test-helpers.js');
 }
 
-var BASE_URL = BASE_ORIGIN + '/fetch/resources/referrer.php';
-var OTHER_URL = OTHER_ORIGIN + '/fetch/resources/referrer.php';
-var referrer_source = location.href;
+const BASE_URL = BASE_ORIGIN + '/fetch/resources/referrer.php';
+const OTHER_URL = OTHER_ORIGIN + '/fetch/resources/referrer.php';
+const REFERRER_SOURCE = location.href;
 
-// Currently we cannot set request's referrer policy and the default policy
-// is used if no CSP is set to the context.
-// But the default policy is equivalent to "no referrer when downgrade" and
-// we cannot test the case with fetch() (without serviceworker).
-var TESTS = [
-  [BASE_URL, 'about:client', referrer_source],
-  [BASE_URL, '', '[no-referrer]'],
-  [BASE_URL, '/foo', BASE_ORIGIN + '/foo'],
-  [OTHER_URL, 'about:client', referrer_source],
-  [OTHER_URL, '', '[no-referrer]'],
-  [OTHER_URL, '/foo', BASE_ORIGIN + '/foo'],
+// There are more tests in referrer/ directory.
+const TESTS = [
+  [BASE_URL, 'about:client', '', REFERRER_SOURCE],
+  [BASE_URL, 'about:client', 'no-referrer', '[no-referrer]'],
+  [BASE_URL, 'about:client', 'no-referrer-when-downgrade', REFERRER_SOURCE],
+  [BASE_URL, 'about:client', 'origin', BASE_ORIGIN + '/'],
+  [BASE_URL, 'about:client', 'origin-when-cross-origin', REFERRER_SOURCE],
+  [BASE_URL, 'about:client', 'unsafe-url', REFERRER_SOURCE],
+  [OTHER_URL, 'about:client', '', REFERRER_SOURCE],
+  [OTHER_URL, 'about:client', 'no-referrer', '[no-referrer]'],
+  [OTHER_URL, 'about:client', 'no-referrer-when-downgrade', REFERRER_SOURCE],
+  [OTHER_URL, 'about:client', 'origin', BASE_ORIGIN + '/'],
+  [OTHER_URL, 'about:client', 'origin-when-cross-origin', BASE_ORIGIN + '/'],
+  [OTHER_URL, 'about:client', 'unsafe-url', REFERRER_SOURCE],
+
+  [BASE_URL, '', '', '[no-referrer]'],
+  [BASE_URL, '', 'no-referrer', '[no-referrer]'],
+  [BASE_URL, '', 'no-referrer-when-downgrade', '[no-referrer]'],
+  [BASE_URL, '', 'origin', '[no-referrer]'],
+  [BASE_URL, '', 'origin-when-cross-origin', '[no-referrer]'],
+  [BASE_URL, '', 'unsafe-url', '[no-referrer]'],
+  [OTHER_URL, '', '', '[no-referrer]'],
+  [OTHER_URL, '', 'no-referrer', '[no-referrer]'],
+  [OTHER_URL, '', 'no-referrer-when-downgrade', '[no-referrer]'],
+  [OTHER_URL, '', 'origin', '[no-referrer]'],
+  [OTHER_URL, '', 'origin-when-cross-origin', '[no-referrer]'],
+  [OTHER_URL, '', 'unsafe-url', '[no-referrer]'],
+
+  [BASE_URL, '/foo', '', BASE_ORIGIN + '/foo'],
+  [BASE_URL, '/foo', 'no-referrer', '[no-referrer]'],
+  [BASE_URL, '/foo', 'no-referrer-when-downgrade', BASE_ORIGIN + '/foo'],
+  [BASE_URL, '/foo', 'origin', BASE_ORIGIN + '/'],
+  [BASE_URL, '/foo', 'origin-when-cross-origin', BASE_ORIGIN + '/foo'],
+  [BASE_URL, '/foo', 'unsafe-url', BASE_ORIGIN + '/foo'],
+  [OTHER_URL, '/foo', '', BASE_ORIGIN + '/foo'],
+  [OTHER_URL, '/foo', 'no-referrer', '[no-referrer]'],
+  [OTHER_URL, '/foo', 'no-referrer-when-downgrade', BASE_ORIGIN + '/foo'],
+  [OTHER_URL, '/foo', 'origin', BASE_ORIGIN + '/'],
+  [OTHER_URL, '/foo', 'origin-when-cross-origin', BASE_ORIGIN + '/'],
+  [OTHER_URL, '/foo', 'unsafe-url', BASE_ORIGIN + '/foo'],
+
   [BASE_URL,
     (BASE_URL + '/path#fragment?query#hash').replace('//', '//user:pass@'),
+    'unsafe-url',
     BASE_URL + '/path'],
 ];
 
 add_referrer_tests(TESTS);
 done();