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
diff --git a/chrome/browser/ui/gtk/extensions/extension_installed_bubble_gtk.cc b/chrome/browser/ui/gtk/extensions/extension_installed_bubble_gtk.cc
index 767e4a8efb55e808a68e055700301c344d286f52..825e04212ad6d2a6664f7abc427e59b952eebd00 100644
--- a/chrome/browser/ui/gtk/extensions/extension_installed_bubble_gtk.cc
+++ b/chrome/browser/ui/gtk/extensions/extension_installed_bubble_gtk.cc
@@ -144,8 +144,8 @@ void ExtensionInstalledBubbleGtk::ShowInternal() {
     // 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_VISIBLE(reference_widget)) {
-      reference_widget = GTK_WIDGET_VISIBLE(toolbar->chevron()) ?
+    if (reference_widget && !gtk_widget_get_visible(reference_widget)) {
+      reference_widget = gtk_widget_get_visible(toolbar->chevron()) ?
           toolbar->chevron() : NULL;
     }
   } else if (type_ == PAGE_ACTION) {