Make no-location redirect response to be "opaque redirect" when redirect mode is manual.

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

 if (self.importScripts) {
   importScripts('../resources/fetch-test-helpers.js');
 }
 
 promise_test(function(t) {
     return fetch('http://')
       .then(
         t.unreached_func('fetch of invalid URL must fail'),
         function() {});
   }, 'Fetch invalid URL');
@@ skipping 229 matching lines @@
           assert_false(response.redirected);
           if (self.internals) {
             assert_array_equals(
                 self.internals.getInternalResponseURLList(response),
                 [redirect_original_url]);
           }
         });
   }, 'Manual redirect fetch returns opaque redirect response');
 
 promise_test(function(t) {
+    var redirect_target_url = 'noLocation';
+    var redirect_original_url =
+      BASE_ORIGIN + '/serviceworker/resources/redirect.php?Redirect=' +
+      redirect_target_url;

[hiroshige, 2017/04/12 00:25:42]

nit: just using '/serviceworker/resources/redirect.php?Redirect=noLocation'
might be better because 'noLocation' is not a URL and the name
redirect_target_url might be confusing.

[horo, 2017/04/12 04:48:39]

Done.

+
+    var request = new Request(redirect_original_url, {redirect: 'manual'});
+    assert_equals(request.url, redirect_original_url,
+      'Request\'s url is the original URL');
+    assert_equals(request.redirect, 'manual');
+
+    return fetch(request)
+      .then(function(response) {
+          assert_equals(response.status, 0);
+          assert_equals(response.type, 'opaqueredirect');
+          assert_equals(response.url, request.url);
+          assert_false(response.redirected);
+          if (self.internals) {
+            assert_array_equals(
+                self.internals.getInternalResponseURLList(response),
+                [redirect_original_url]);
+          }
+        });
+  }, 'Manual redirect fetch returns opaque redirect response even if location' +
+     'header is not set');
+
+promise_test(function(t) {
     var redirect_target_url =
       OTHER_ORIGIN + '/fetch/resources/fetch-status.php?status=200';
     var redirect_original_url =
       OTHER_ORIGIN + '/serviceworker/resources/redirect.php?Redirect=' +
       redirect_target_url;
 
     var request = new Request(redirect_original_url,
                               {headers: [['X-Fetch-Test', 'A']],
                                redirect: 'manual'});
 
@@ skipping 183 matching lines @@
     assert_true(req.bodyUsed);
 }, 'Calling fetch() disturbs body if not null');
 
 test(t => {
     var req = new Request('/', {method: 'POST'});
     fetch(req);
     assert_false(req.bodyUsed);
 }, 'Calling fetch() doesn\'t disturb body if null');
 
 done();