Move Extension into extensions namespace

chrome/common/extensions/manifest_tests/extension_manifests_options_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 "chrome/common/extensions/manifest_tests/extension_manifest_test.h"
 
 #include "chrome/common/extensions/extension_manifest_constants.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace errors = extension_manifest_errors;
 
 TEST_F(ExtensionManifestTest, OptionsPageInApps) {
-  scoped_refptr<Extension> extension;
+  scoped_refptr<extensions::Extension> extension;
 
   // Allow options page with absolute URL in hosted apps.
   extension = LoadAndExpectSuccess("hosted_app_absolute_options.json");
   EXPECT_STREQ("http",
                extension->options_url().scheme().c_str());
   EXPECT_STREQ("example.com",
                extension->options_url().host().c_str());
   EXPECT_STREQ("options.html",
                extension->options_url().ExtractFileName().c_str());
 
   Testcase testcases[] = {
     // Forbid options page with relative URL in hosted apps.
     Testcase("hosted_app_relative_options.json",
              errors::kInvalidOptionsPageInHostedApp),
 
     // Forbid options page with non-(http|https) scheme in hosted app.
     Testcase("hosted_app_file_options.json",
              errors::kInvalidOptionsPageInHostedApp),
 
     // Forbid absolute URL for options page in packaged apps.
     Testcase("packaged_app_absolute_options.json",
              errors::kInvalidOptionsPageExpectUrlInPackage)
   };
   RunTestcases(testcases, arraysize(testcases),
                EXPECT_TYPE_ERROR);
 }