Moved CrxInstaller and CrxInstallerError into extensions namespace

chrome/browser/policy/app_pack_updater.h

 // 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.
 
 #ifndef CHROME_BROWSER_POLICY_APP_PACK_UPDATER_H_
 #define CHROME_BROWSER_POLICY_APP_PACK_UPDATER_H_
 #pragma once
 
 #include <map>
 #include <set>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/file_path.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "chrome/browser/extensions/updater/extension_downloader_delegate.h"
 #include "chrome/browser/policy/cloud_policy_subsystem.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "net/base/network_change_notifier.h"
 
-class CrxInstaller;
 class ExternalExtensionLoader;
 class FilePath;
 class GURL;
 
 namespace extensions {
+class CrxInstaller;
 class ExtensionDownloader;
 }
 
 namespace net {
 class URLRequestContextGetter;
 }
 
 namespace tracked_objects {
 class Location;
 }
@@ skipping 190 matching lines @@
 
   // Request context used by the |downloader_|.
   net::URLRequestContextGetter* request_context_;
 
   DISALLOW_COPY_AND_ASSIGN(AppPackUpdater);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_APP_PACK_UPDATER_H_