Move Extension into extensions namespace

chrome/browser/ui/cocoa/extensions/extension_installed_bubble_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/basictypes.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/values.h"
 #import "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/cocoa/cocoa_profile_test.h"
 #import "chrome/browser/ui/cocoa/extensions/extension_installed_bubble_controller.h"
 #import "chrome/browser/ui/cocoa/info_bubble_window.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_manifest_constants.h"
 #include "third_party/ocmock/gtest_support.h"
 #import "third_party/ocmock/OCMock/OCMock.h"
 #include "webkit/glue/image_decoder.h"
 
+using extensions::Extension;
+
 // ExtensionInstalledBubbleController with removePageActionPreview overridden
 // to a no-op, because pageActions are not yet hooked up in the test browser.
 @interface ExtensionInstalledBubbleControllerForTest :
     ExtensionInstalledBubbleController {
 }
 
 // Do nothing, because browser window is not set up with page actions
 // for unit testing.
 - (void)removePageActionPreview;
 
@@ skipping 187 matching lines @@
   // The bubble window goes from visible to not-visible.
   EXPECT_TRUE([bubbleWindow isVisible]);
   [window_ close];
   EXPECT_FALSE([bubbleWindow isVisible]);
 
   [[NSNotificationCenter defaultCenter] removeObserver:observer];
 
   // Check that the appropriate notification was received.
   EXPECT_OCMOCK_VERIFY(observer);
 }