Add PermissionStatus.state and deprecate PermissionStatus.status.

LayoutTests/http/tests/permissions/chromium/resources/test-change-event.js

 if (self.importScripts) {
     importScripts('../../resources/helpers.js');
     importScripts('testrunner-helpers.js');
 
     if (get_current_scope() == 'ServiceWorker')
         importScripts('../../../serviceworker/resources/worker-testharness.js');
     else
         importScripts('../../../resources/testharness.js');
 }
 
 async_test(function(t) {
     setPermission('geolocation', 'granted', location.origin, location.origin).then(t.step_func(function() {
         navigator.permissions.query({name:'geolocation'}).then(t.step_func(function(p) {
-            assert_equals(p.status, 'granted');

[whywhat, 2015/06/22 10:42:46]

Don't you want to make sure the deprecated but not removed yet property still
works?

[mlamouri (slow - plz ping), 2015/06/29 19:26:06]

Given that the code is simplistic: just calling state(), I think it's not worth
the overhead.

+            assert_equals(p.state, 'granted');
 
             p.onchange = t.step_func(function() {
-                assert_equals(p.status, 'denied');
+                assert_equals(p.state, 'denied');
 
                 p.onchange = t.step_func(function() {
                     assert_unreached('the permission should not change again.');
                 });
 
                 setPermission('geolocation', 'prompt', 'https://example.com', 'https://example.com');
                 setPermission('geolocation', 'prompt', 'https://example.com', location.origin);
                 setPermission('geolocation', 'prompt', location.origin, 'https://example.com');
 
                 navigator.permissions.query({name:'geolocation'}).then(t.step_func(function(p) {
-                    assert_equals(p.status, 'denied');
+                    assert_equals(p.state, 'denied');
                     t.done();
                 }));
             });
 
             setPermission('geolocation', 'denied', location.origin, location.origin);
         }));
     }));
 }, 'Testing that the change event is correctly sent. Scope: ' + get_current_scope());
 
 done();