Move Extension into extensions namespace

chrome/browser/ui/cocoa/extensions/extension_install_dialog_controller_unittest.mm

 // 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.
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/compiler_specific.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/json/json_file_value_serializer.h"
 #import "base/memory/scoped_nsobject.h"
 #include "base/path_service.h"
 #include "base/sys_string_conversions.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
 #import "chrome/browser/extensions/extension_install_ui.h"
 #include "chrome/browser/ui/cocoa/cocoa_profile_test.h"
 #import "chrome/browser/ui/cocoa/extensions/extension_install_dialog_controller.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/extensions/extension.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #import "testing/gtest_mac.h"
 #include "testing/platform_test.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/gfx/image/image.h"
 #include "webkit/glue/image_decoder.h"
 
+using extensions::Extension;
 
 // Base class for our tests.
 class ExtensionInstallDialogControllerTest : public CocoaProfileTest {
 public:
   ExtensionInstallDialogControllerTest() {
     PathService::Get(chrome::DIR_TEST_DATA, &test_data_dir_);
     test_data_dir_ = test_data_dir_.AppendASCII("extensions")
                                    .AppendASCII("install_prompt");
 
     LoadIcon();
@@ skipping 295 matching lines @@
 
   // Though we have no permissions warnings, these should still be hooked up,
   // just invisible.
   EXPECT_TRUE([controller subtitleField] != nil);
   EXPECT_TRUE([[controller subtitleField] isHidden]);
   EXPECT_TRUE([controller warningsField] != nil);
   EXPECT_TRUE([[controller warningsField] isHidden]);
   EXPECT_TRUE([controller warningsSeparator] != nil);
   EXPECT_TRUE([[controller warningsSeparator] isHidden]);
 }