app_list: Use NTP ordering in ExtensionSorting to sort apps.

chrome/browser/ui/app_list/extension_app_item.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_APP_LIST_EXTENSION_APP_ITEM_H_
 #define CHROME_BROWSER_UI_APP_LIST_EXTENSION_APP_ITEM_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/extensions/extension_icon_image.h"
 #include "chrome/browser/ui/app_list/chrome_app_list_item.h"
+#include "sync/api/string_ordinal.h"
 #include "ui/base/models/simple_menu_model.h"
 
 class AppListController;
 class ExtensionResource;
 class Profile;
 class SkBitmap;
 
 namespace extensions {
 class Extension;
 }
 
 // ExtensionAppItem represents an extension app in app list.
 class ExtensionAppItem : public ChromeAppListItem,
                          public extensions::IconImage::Observer,
                          public ui::SimpleMenuModel::Delegate {
  public:
   ExtensionAppItem(Profile* profile,
                    const extensions::Extension* extension,
                    AppListController* controller);
   virtual ~ExtensionAppItem();
 
   // Gets extension associated with this model. Returns NULL if extension
   // no longer exists.
   const extensions::Extension* GetExtension() const;
 
-  const std::string& extension_id() const {
-    return extension_id_;
-  }
+  syncer::StringOrdinal GetPageOrdinal() const;
+  syncer::StringOrdinal GetAppLaunchOrdinal() const;
+
+  const std::string& extension_id() const { return extension_id_; }
 
  private:
   // Returns true if this item represents a version of the Talk extension.
   bool IsTalkExtension() const;
 
   // Loads extension icon.
   void LoadImage(const extensions::Extension* extension);
 
   void ShowExtensionOptions();
   void ShowExtensionDetails();
@@ skipping 21 matching lines @@
   const std::string extension_id_;
   AppListController* controller_;
 
   scoped_ptr<extensions::IconImage> icon_;
   scoped_ptr<ui::SimpleMenuModel> context_menu_model_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionAppItem);
 };
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_EXTENSION_APP_ITEM_H_