Remove last dependencies on ui/base from ui/gfx

ui/gfx/gtk_preserve_window.h

Index: ui/gfx/gtk_preserve_window.h
diff --git a/ui/gfx/gtk_preserve_window.h b/ui/gfx/gtk_preserve_window.h
index f48be3f2bdbd0a9af5b2640a50bed311fedc79da..5b5198bf56f47dc308da36e8a94955f112e1990b 100644
--- a/ui/gfx/gtk_preserve_window.h
+++ b/ui/gfx/gtk_preserve_window.h
@@ -46,25 +46,25 @@ struct _GtkPreserveWindowClass {
   GtkFixedClass parent_class;
 };
 
-UI_EXPORT GType gtk_preserve_window_get_type() G_GNUC_CONST;
-UI_EXPORT GtkWidget* gtk_preserve_window_new();
+GFX_EXPORT GType gtk_preserve_window_get_type() G_GNUC_CONST;
+GFX_EXPORT GtkWidget* gtk_preserve_window_new();
 
 // Whether or not we should preserve associated windows as the widget
 // is realized or unrealized.
-UI_EXPORT gboolean gtk_preserve_window_get_preserve(GtkPreserveWindow* widget);
-UI_EXPORT void gtk_preserve_window_set_preserve(GtkPreserveWindow* widget,
-                                                gboolean value);
+GFX_EXPORT gboolean gtk_preserve_window_get_preserve(GtkPreserveWindow* widget);
+GFX_EXPORT void gtk_preserve_window_set_preserve(GtkPreserveWindow* widget,
+                                                 gboolean value);
 
 // Whether or not someone else will gdk_window_resize the GdkWindow associated
 // with this widget (needed by the GPU process to synchronize resizing
 // with swapped between front and back buffer).
-UI_EXPORT void gtk_preserve_window_delegate_resize(GtkPreserveWindow* widget,
-                                                   gboolean delegate);
+GFX_EXPORT void gtk_preserve_window_delegate_resize(GtkPreserveWindow* widget,
+                                                    gboolean delegate);
 
 // Provide a function to return an AtkObject* when calls to get_accessible
 // are made on this widget. The parameter |userdata| will be passed to the
 // factory function.
-UI_EXPORT void gtk_preserve_window_set_accessible_factory(
+GFX_EXPORT void gtk_preserve_window_set_accessible_factory(
     GtkPreserveWindow* widget,
     AtkObject* (*factory)(void* userdata),
     gpointer userdata);