Revert 91761 - GTK: More 2.18 goodness. Move from macros to real accessor functions.

chrome/browser/ui/gtk/extensions/extension_installed_bubble_gtk.cc

Index: chrome/browser/ui/gtk/extensions/extension_installed_bubble_gtk.cc
===================================================================
--- chrome/browser/ui/gtk/extensions/extension_installed_bubble_gtk.cc	(revision 91772)
+++ chrome/browser/ui/gtk/extensions/extension_installed_bubble_gtk.cc	(working copy)
@@ -144,8 +144,8 @@
     // If the widget is not visible then browser_window could be incognito
     // with this extension disabled. Try showing it on the chevron.
     // If that fails, fall back to default position.
-    if (reference_widget && !gtk_widget_get_visible(reference_widget)) {
-      reference_widget = gtk_widget_get_visible(toolbar->chevron()) ?
+    if (reference_widget && !GTK_WIDGET_VISIBLE(reference_widget)) {
+      reference_widget = GTK_WIDGET_VISIBLE(toolbar->chevron()) ?
           toolbar->chevron() : NULL;
     }
   } else if (type_ == PAGE_ACTION) {