Allow pages on the OSX app launcher to be turned while dragging.

ui/app_list/cocoa/app_list_view_controller.h

 // Copyright 2013 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 UI_APP_LIST_COCOA_APP_LIST_VIEW_CONTROLLER_H_
 #define UI_APP_LIST_COCOA_APP_LIST_VIEW_CONTROLLER_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/memory/scoped_nsobject.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/app_list/app_list_export.h"
 #import "ui/app_list/cocoa/apps_pagination_model_observer.h"
 
 namespace app_list {
 class AppListViewDelegate;
 }
 
 @class AppsGridController;
+@class AppListPagerView;
 
 // Controller for the top-level view of the app list UI. It creates and hosts an
 // AppsGridController (displaying an AppListModel), and pager control for
 // navigating between pages in the grid.
 APP_LIST_EXPORT
 @interface AppListViewController :
     NSViewController<AppsPaginationModelObserver, NSTextFieldDelegate> {
  @private
   scoped_nsobject<AppsGridController> appsGridController_;
-  scoped_nsobject<NSSegmentedControl> pagerControl_;
+  scoped_nsobject<AppListPagerView> pagerControl_;
   scoped_ptr<app_list::AppListViewDelegate> delegate_;
 }
 
 - (AppsGridController*)appsGridController;
 
 - (NSSegmentedControl*)pagerControl;
 
 - (app_list::AppListViewDelegate*)delegate;
 
 - (void)setDelegate:(scoped_ptr<app_list::AppListViewDelegate>)newDelegate;
 
 @end
 
 #endif  // UI_APP_LIST_COCOA_APP_LIST_VIEW_CONTROLLER_H_