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 3958d67e4ac4edeae84357c95379d6808537021d..db4c1fe68fdcbf78fd1e2433ee1f6c2daa1268c8 100644
--- a/ui/app_list/views/apps_grid_view.h
+++ b/ui/app_list/views/apps_grid_view.h
@@ -79,6 +79,9 @@ 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);