Move Extension into extensions namespace

chrome/browser/extensions/platform_app_browsertest.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 "base/command_line.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/automation/automation_util.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/extensions/extension_browsertest.h"
@@ skipping 47 matching lines @@
  protected:
   void LoadAndLaunchPlatformApp(const char* name) {
     ui_test_utils::WindowedNotificationObserver app_loaded_observer(
         content::NOTIFICATION_LOAD_COMPLETED_MAIN_FRAME,
         content::NotificationService::AllSources());
 
     EXPECT_TRUE(LoadExtension(test_data_dir_.AppendASCII("platform_apps").
         AppendASCII(name)));
 
     ExtensionService* service = browser()->profile()->GetExtensionService();
-    const Extension* extension = service->GetExtensionById(
+    const extensions::Extension* extension = service->GetExtensionById(
         last_loaded_extension_id_, false);
     EXPECT_TRUE(extension);
 
     Browser::OpenApplication(
         browser()->profile(),
         extension,
         extension_misc::LAUNCH_NONE,
         GURL(),
         NEW_WINDOW);
 
@@ skipping 107 matching lines @@
       set_cookie_url,
       browser()->GetWebContentsAt(0),
       &cookie_size,
       &cookie_value);
   ASSERT_EQ("testCookie=1", cookie_value);
 
   // Let the platform app request the same URL, and make sure that it doesn't
   // see the cookie.
   ASSERT_TRUE(RunPlatformAppTest("platform_apps/isolation")) << message_;
 }