Try two for flicker free drawing

views/controls/native/native_view_host_gtk.h

Index: views/controls/native/native_view_host_gtk.h
diff --git a/views/controls/native/native_view_host_gtk.h b/views/controls/native/native_view_host_gtk.h
index 0ecfd991100cf4ff5393fc0d65adb005de524c5b..84b0a361a1a28732429924b2e557fff625755881 100644
--- a/views/controls/native/native_view_host_gtk.h
+++ b/views/controls/native/native_view_host_gtk.h
@@ -57,6 +57,9 @@ class NativeViewHostGtk : public NativeViewHostWrapper {
   // on a descendant of fixed_.
   GtkWidget* GetFocusedDescendant();
 
+  // Connects a new host widget.
+  void AttachHostWidget();
+
   // Invoked from the 'destroy' signal.
   static void CallDestroy(GtkObject* object, NativeViewHostGtk* host);