Move Extension into extensions namespace

chrome/browser/ui/views/ash/launcher/launcher_app_icon_loader.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_UI_VIEWS_ASH_LAUNCHER_LAUNCHER_APP_ICON_LOADER_H_
 #define CHROME_BROWSER_UI_VIEWS_ASH_LAUNCHER_LAUNCHER_APP_ICON_LOADER_H_
 #pragma once
 
 #include <map>
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/extensions/image_loading_tracker.h"
 #include "chrome/browser/ui/views/ash/launcher/chrome_launcher_controller.h"
 
+class Profile;
+
+namespace extensions {
 class Extension;
-class Profile;
+}
+
 
 // Default implementation of LauncherUpdater::AppIconLoader that interacts
 // with the ExtensionService and ImageLoadingTracker to load images.
 class LauncherAppIconLoader : public ChromeLauncherController::AppIconLoader,
                               public ImageLoadingTracker::Observer {
  public:
   LauncherAppIconLoader(Profile* profile, ChromeLauncherController* host);
   virtual ~LauncherAppIconLoader();
 
   // AppIconLoader:
   virtual std::string GetAppID(TabContentsWrapper* tab) OVERRIDE;
   virtual bool IsValidID(const std::string& id) OVERRIDE;
   virtual void FetchImage(const std::string& id) OVERRIDE;
 
   // ImageLoadingTracker::Observer:
   virtual void OnImageLoaded(const gfx::Image& image,
                              const std::string& extension_id,
                              int index) OVERRIDE;
 
  private:
   typedef std::map<int, std::string> ImageLoaderIDToExtensionIDMap;
 
   // Returns the extension for the specified tab.
-  const Extension* GetExtensionForTab(TabContentsWrapper* tab);
+  const extensions::Extension* GetExtensionForTab(TabContentsWrapper* tab);
 
   // Returns the extension by ID.
-  const Extension* GetExtensionByID(const std::string& id);
+  const extensions::Extension* GetExtensionByID(const std::string& id);
 
   Profile* profile_;
 
   // ChromeLauncherController we're associated with (and owned by).
   ChromeLauncherController* host_;
 
   // Used to load images.
   scoped_ptr<ImageLoadingTracker> image_loader_;
 
   // Maps from id from the ImageLoadingTracker to the extension id.
   ImageLoaderIDToExtensionIDMap map_;
 
   DISALLOW_COPY_AND_ASSIGN(LauncherAppIconLoader);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_ASH_LAUNCHER_LAUNCHER_APP_ICON_LOADER_H_