Move Extension into extensions namespace

chrome/browser/extensions/api/extension_action/page_action_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/extension_apitest.h"
 #include "chrome/browser/extensions/extension_browser_event_router.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_tab_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sessions/restore_tab_helper.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/omnibox/location_bar.h"
 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_action.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/web_contents.h"
 
+using extensions::Extension;
+
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, PageAction) {
   ASSERT_TRUE(test_server()->Start());
   ASSERT_TRUE(RunExtensionTest("page_action/basics")) << message_;
   const Extension* extension = GetSingleLoadedExtension();
   ASSERT_TRUE(extension) << message_;
   {
     // Tell the extension to update the page action state.
     ResultCatcher catcher;
     ui_test_utils::NavigateToURL(browser(),
         GURL(extension->GetResourceURL("update.html")));
@@ skipping 168 matching lines @@
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, Getters) {
   ASSERT_TRUE(RunExtensionTest("page_action/getters")) << message_;
   const Extension* extension = GetSingleLoadedExtension();
   ASSERT_TRUE(extension) << message_;
 
   ResultCatcher catcher;
   ui_test_utils::NavigateToURL(browser(),
       GURL(extension->GetResourceURL("update.html")));
   ASSERT_TRUE(catcher.GetNextResult());
 }