Moved ExtensionPrefs and related into extensions namespace

chrome/browser/extensions/updater/extension_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_EXTENSIONS_UPDATER_EXTENSION_UPDATER_H_
 #define CHROME_BROWSER_EXTENSIONS_UPDATER_EXTENSION_UPDATER_H_
 #pragma once
 
 #include <list>
 #include <stack>
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/file_path.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time.h"
 #include "base/timer.h"
 #include "chrome/browser/extensions/updater/extension_downloader_delegate.h"
 #include "chrome/browser/extensions/updater/manifest_fetch_data.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "googleurl/src/gurl.h"
 
-class ExtensionPrefs;
 class ExtensionServiceInterface;
 class ExtensionSet;
 class PrefService;
 class Profile;
 
 namespace extensions {
 
 class ExtensionDownloader;
+class ExtensionPrefs;
 class ExtensionUpdaterTest;
 
 // A class for doing auto-updates of installed Extensions. Used like this:
 //
 // ExtensionUpdater* updater = new ExtensionUpdater(my_extensions_service,
 //                                                  extension_prefs,
 //                                                  pref_service,
 //                                                  profile,
 //                                                  update_frequency_secs);
 // updater->Start();
@@ skipping 150 matching lines @@
 
   // Fetched CRX files waiting to be installed.
   std::stack<FetchedCRXFile> fetched_crx_files_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionUpdater);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_UPDATER_EXTENSION_UPDATER_H_