GTK: More 2.18 goodness. Move from macros to real accessor functions.

chrome/browser/chromeos/login/screen_locker.cc

Index: chrome/browser/chromeos/login/screen_locker.cc
diff --git a/chrome/browser/chromeos/login/screen_locker.cc b/chrome/browser/chromeos/login/screen_locker.cc
index 0ac3a1ab9d3206e672f3afd29369f20fbe18bb60..ff8eca12405245e0947d55c03107b28d673d44da 100644
--- a/chrome/browser/chromeos/login/screen_locker.cc
+++ b/chrome/browser/chromeos/login/screen_locker.cc
@@ -229,7 +229,7 @@ class LockWindow : public views::NativeWidgetGtk {
   // Sets the widget to move the focus to when clearning the native
   // widget's focus.
   void set_toplevel_focus_widget(GtkWidget* widget) {
-    GTK_WIDGET_SET_FLAGS(widget, GTK_CAN_FOCUS);
+    gtk_widget_set_can_focus(widget, TRUE);
     toplevel_focus_widget_ = widget;
   }