Move Extension into extensions namespace

chrome/browser/extensions/chrome_app_api_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 <string>
 
 #include "base/command_line.h"
 #include "base/json/json_reader.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/string_number_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/extension_browsertest.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/manifest.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/web_contents.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/mock_host_resolver.h"
 
+using extensions::Extension;
+
 class ChromeAppAPITest : public ExtensionBrowserTest {
  protected:
   bool IsAppInstalled() { return IsAppInstalled(L""); }
   bool IsAppInstalled(const std::wstring& frame_xpath) {
     std::wstring get_app_is_installed =
         L"window.domAutomationController.send(window.chrome.app.isInstalled);";
     bool result;
     CHECK(
         ui_test_utils::ExecuteJavaScriptAndExtractBool(
             browser()->GetSelectedWebContents()->GetRenderViewHost(),
@@ skipping 263 matching lines @@
   GURL non_app_url(test_file_url.ReplaceComponents(replace_host));
 
   // Check the install and running state of a non-app iframe running
   // within an app.
   ui_test_utils::NavigateToURL(browser(), app_url);
 
   EXPECT_EQ("not_installed", InstallState(L"//html/iframe[1]"));
   EXPECT_EQ("cannot_run", RunningState(L"//html/iframe[1]"));
   EXPECT_FALSE(IsAppInstalled(L"//html/iframe[1]"));
 }