Stub implementation of Permissions API module.

LayoutTests/http/tests/permissions/resources/test-api-surface.js

+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/publicdomain/zero/1.0/
+
+if (self.importScripts) {
+    importScripts('helpers.js');
+
+    if (get_current_scope() == 'ServiceWorker')
+        importScripts('../../serviceworker/resources/worker-testharness.js');
+    else
+        importScripts('../../resources/testharness.js');
+}
+
+test(function() {
+    assert_own_property(self, 'Permissions');
+    assert_own_property(Permissions, 'query');
+
+    assert_own_property(self, 'PermissionStatus');
+}, 'Check the Permissions API surface in the ' + get_current_scope() + ' scope.');
+
+done();