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

ui/app_list/cocoa/app_list_view_controller.h

Index: ui/app_list/cocoa/app_list_view_controller.h
diff --git a/ui/app_list/cocoa/app_list_view_controller.h b/ui/app_list/cocoa/app_list_view_controller.h
index f18c37c3ff50f353fecec92dd6eeb0286d98c560..80095423bb8455b1f9ce4db76b60818a6851bd6c 100644
--- a/ui/app_list/cocoa/app_list_view_controller.h
+++ b/ui/app_list/cocoa/app_list_view_controller.h
@@ -17,6 +17,7 @@ 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
@@ -26,7 +27,7 @@ APP_LIST_EXPORT
     NSViewController<AppsPaginationModelObserver, NSTextFieldDelegate> {
  @private
   scoped_nsobject<AppsGridController> appsGridController_;
-  scoped_nsobject<NSSegmentedControl> pagerControl_;
+  scoped_nsobject<AppListPagerView> pagerControl_;
   scoped_ptr<app_list::AppListViewDelegate> delegate_;
 }