PlatformAppApiTest class should not enable experimental APIs by default

chrome/browser/extensions/api/notification/notification_apitest.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/extensions/api/notification/notification_api.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/extensions/extension_function_test_utils.h"
+#include "chrome/common/chrome_switches.h"
 
 using extensions::Extension;
 
 namespace utils = extension_function_test_utils;
 
 namespace {
 
-class NotificationApiTest : public PlatformAppApiTest {
+class NotificationApiTest : public ExtensionApiTest {
+ public:
+  virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
+    ExtensionApiTest::SetUpCommandLine(command_line);
+    command_line->AppendSwitch(switches::kEnableExperimentalExtensionApis);
+  }
 };
 
 }  // namespace
 
 IN_PROC_BROWSER_TEST_F(NotificationApiTest, TestNothing) {
   scoped_refptr<extensions::NotificationShowFunction>
       notification_show_function(new extensions::NotificationShowFunction());
   scoped_refptr<Extension> empty_extension(utils::CreateEmptyExtension());
 
   notification_show_function->set_extension(empty_extension.get());
   notification_show_function->set_has_callback(true);
 
   scoped_ptr<base::Value> result(utils::RunFunctionAndReturnSingleResult(
       notification_show_function,
       "[{\"text\": \"Check out Cirque du Soleil\"}]",
       browser(), utils::NONE));
   ASSERT_EQ(base::Value::TYPE_BOOLEAN, result->GetType());
 }