Move small c/b/extensions classes into extensions namespace no.1

chrome/browser/extensions/app_shortcut_manager.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_APP_SHORTCUT_MANAGER_H_
 #define CHROME_BROWSER_EXTENSIONS_APP_SHORTCUT_MANAGER_H_
 
 #include "chrome/browser/extensions/image_loading_tracker.h"
 #include "chrome/browser/shell_integration.h"
 #include "chrome/common/extensions/extension.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
 class Profile;
 
+namespace extensions {
 // This class manages the installation of shortcuts for platform apps.
 class AppShortcutManager : public ImageLoadingTracker::Observer,
                            public content::NotificationObserver {
  public:
   explicit AppShortcutManager(Profile* profile);
 
   // Implement ImageLoadingTracker::Observer. |tracker_| is used to
   // load the application's icon, which is done when we start creating an
   // application's shortcuts. This method receives the icon, and completes
   // the process of installing the shortcuts.
   virtual void OnImageLoaded(const gfx::Image& image,
                              const std::string& extension_id,
                              int index) OVERRIDE;
 
   // content::NotificationObserver
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
   static void SetShortcutCreationDisabledForTesting(bool disabled);
  private:
   // Install the shortcuts for an application.
-  void InstallApplicationShortcuts(const extensions::Extension* extension);
-  void DeleteApplicationShortcuts(const extensions::Extension* extension);
+  void InstallApplicationShortcuts(const Extension* extension);
+  void DeleteApplicationShortcuts(const Extension* extension);
 
   content::NotificationRegistrar registrar_;
   Profile* profile_;
 
   // Fields used when installing application shortcuts.
   ShellIntegration::ShortcutInfo shortcut_info_;
   ImageLoadingTracker tracker_;
 
   DISALLOW_COPY_AND_ASSIGN(AppShortcutManager);
 };
+}  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_APP_SHORTCUT_MANAGER_H_