Notification.permission's default value of "default" should be testable.

content/shell/renderer/test_runner/TestRunner.cpp

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2010 Pawel Hajdan (phajdan.jr@chromium.org)
  * Copyright (C) 2012 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ skipping 1803 matching lines @@
     result->setNull();
     if (arguments.size() < 1 || !arguments[0].isBool())
         return;
     const vector<WebTestProxyBase*>& windowList = m_testInterfaces->windowList();
     for (unsigned i = 0; i < windowList.size(); ++i)
         windowList.at(i)->midiClientMock()->setSysExPermission(arguments[0].toBoolean());
 }
 
 void TestRunner::grantWebNotificationPermission(const CppArgumentList& arguments, CppVariant* result)
 {
-    if (arguments.size() != 1 || !arguments[0].isString()) {
-        result->set(false);
+    result->setNull();
+    if (arguments.size() < 1 || !arguments[0].isString())
         return;
-    }
-    notification_presenter_->GrantPermission(arguments[0].toString());
-    result->set(true);
+
+    bool permissionGranted = true;
+    if (arguments.size() == 2 && arguments[1].isBool())
+        permissionGranted = arguments[1].toBoolean();
+
+    notification_presenter_->GrantPermission(arguments[0].toString(), permissionGranted);
 }
 
 void TestRunner::simulateLegacyWebNotificationClick(const CppArgumentList& arguments, CppVariant* result)
 {
     if (arguments.size() != 1 || !arguments[0].isString()) {
         result->set(false);
         return;
     }
     result->set(notification_presenter_->SimulateClick(arguments[0].toString()));
 }
@@ skipping 276 matching lines @@
     result->setNull();
 }
 
 void TestRunner::setPointerLockWillFailSynchronously(const CppArgumentList&, CppVariant* result)
 {
     m_pointerLockPlannedResult = PointerLockWillFailSync;
     result->setNull();
 }
 
 }