Center and change the aspect ratio for the experimental app list. [Win]

ui/app_list/views/apps_grid_view.h

Index: ui/app_list/views/apps_grid_view.h
diff --git a/ui/app_list/views/apps_grid_view.h b/ui/app_list/views/apps_grid_view.h
index 32be85640d1b1333aa9a9bc41a723afd92566ac4..db6efb43e9ecb06730296fe9046766731b7e081b 100644
--- a/ui/app_list/views/apps_grid_view.h
+++ b/ui/app_list/views/apps_grid_view.h
@@ -81,6 +81,9 @@ class APP_LIST_EXPORT AppsGridView : public views::View,
   // is no longer called to dynamically choosing those layout params.
   void SetLayout(int icon_size, int cols, int rows_per_page);
 
+  int cols() { return cols_; }
+  int rows_per_page() { return rows_per_page_; }
+
   // Sets |model| to use. Note this does not take ownership of |model|.
   void SetModel(AppListModel* model);