Forward port new wxRenderer methods in 2.8 to trunk.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@57313 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/private.h

@@ -119,9 +119,12 @@ namespace wxGTKPrivate
 // shutdown
 GtkWidget *GetButtonWidget();
 GtkWidget *GetCheckButtonWidget();
+GtkWidget *GetComboBoxWidget();
 GtkWidget *GetEntryWidget();
 GtkWidget *GetHeaderButtonWidget();
+GtkWidget *GetRadioButtonWidget();
 GtkWidget *GetSplitterWidget();
+GtkWidget *GetTextEntryWidget();
 GtkWidget *GetTreeWidget();
 
 } // wxGTKPrivate