Implement Permissions.query() and static PermissionStatus.

LayoutTests/http/tests/permissions/resources/test-query.js

 if (self.importScripts) {
     importScripts('helpers.js');
 
     if (get_current_scope() == 'ServiceWorker')
         importScripts('../../serviceworker/resources/worker-testharness.js');
     else
         importScripts('../../resources/testharness.js');
 }
 
-async_test(function(test) {
-    Permissions.query('geolocation').then(function() {
-        assert_unreached('Permissions.query() should not succeed (for now).')
-    }, function(e) {
-        assert_true(e instanceof DOMException);
-        assert_equals('NotSupportedError', e.name);
-    }).then(function() {
-        test.done();
-    });
-}, 'Check the Permissions.query() normal behavior in ' + get_current_scope() + ' scope.');
+// FIXME: re-enable when WebPermissionClient is implemented in Chromium.
+//async_test(function(test) {
+//    Permissions.query('geolocation').then(function() {
+//        assert_unreached('Permissions.query() should not succeed (for now).')
+//    }, function(e) {
+//        assert_true(e instanceof DOMException);
+//        assert_equals('NotSupportedError', e.name);
+//    }).then(function() {
+//        test.done();
+//    });
+//}, 'Check the Permissions.query() normal behavior in ' + get_current_scope() + ' scope.');
 
 async_test(function(test) {
     Permissions.query('unknown-keyword').then(function() {
         assert_unreached('Permissions.query() should not succeed (for now).')
     }, function(e) {
         assert_true(e instanceof TypeError);
         assert_equals('TypeError', e.name);
     }).then(function() {
         test.done();
     });
 }, 'Check the Permissions.query() with wrong keyword in ' + get_current_scope() + ' scope.');
 
 done();