Re-enable a push subscription-without-permission layout test.

Now that the appropriate DOMException is being thrown, we can test for that.

This CL is part of a three-sided patch:
  [1] https://codereview.chromium.org/1314493008/
  [2] https://codereview.chromium.org/1316973002/
  [3] This CL.

BUG=522206

Review URL: https://codereview.chromium.org/1313493003

git-svn-id: svn://svn.chromium.org/blink/trunk@201556 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/LayoutTests/http/tests/push_messaging/subscribe-failure-permission-denied-in-document.html

@@ -27,8 +27,7 @@ async_test(function(test) {
         .then(function(pushSubscription) {
             assert_unreached('Subscription must not succeed after permission is denied.');
         }, function(e) {
-            // TODO(peter): Re-enable this assert when the appropriate error is being thrown.
-            //assert_equals(e.name, 'AbortError');
+            assert_equals(e.name, 'PermissionDeniedError');
             assert_regexp_match(e.message, /permission denied/);
             return service_worker_unregister_and_done(test, workerScope);
         })