Move Extension into extensions namespace

chrome/browser/extensions/extension_special_storage_policy_unittest.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/message_loop.h"
 #include "base/values.h"
 #include "chrome/browser/content_settings/cookie_settings.h"
 #include "chrome/browser/extensions/extension_special_storage_policy.h"
 #include "chrome/common/content_settings.h"
 #include "chrome/common/content_settings_types.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_manifest_constants.h"
 #include "chrome/test/base/testing_profile.h"
 #include "content/test/test_browser_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using content::BrowserThread;
+using extensions::Extension;
 
 namespace keys = extension_manifest_keys;
 
 class ExtensionSpecialStoragePolicyTest : public testing::Test {
  protected:
   scoped_refptr<Extension> CreateProtectedApp() {
 #if defined(OS_WIN)
     FilePath path(FILE_PATH_LITERAL("c:\\foo"));
 #elif defined(OS_POSIX)
     FilePath path(FILE_PATH_LITERAL("/foo"));
@@ skipping 219 matching lines @@
                                     CONTENT_SETTING_SESSION_ONLY);
 
   EXPECT_TRUE(policy->HasSessionOnlyOrigins());
 
   // Clearing an origin-specific rule.
   cookie_settings->ResetCookieSetting(pattern,
                                       ContentSettingsPattern::Wildcard());
 
   EXPECT_FALSE(policy->HasSessionOnlyOrigins());
 }