Move src/gfx/ to src/ui/gfx...

ui/gfx/gtk_preserve_window.h

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef GFX_GTK_PRESERVE_WINDOW_H_
-#define GFX_GTK_PRESERVE_WINDOW_H_
+#ifndef UI_GFX_GTK_PRESERVE_WINDOW_H_
+#define UI_GFX_GTK_PRESERVE_WINDOW_H_
 #pragma once
 
 #include <gdk/gdk.h>
 #include <gtk/gtk.h>
 
 // GtkFixed creates an X window when realized and destroys an X window
 // when unrealized. GtkPreserveWindow allows overrides this
 // behaviour. When preserve is set (via gtk_preserve_window_set_preserve),
 // the X window is only destroyed when the widget is destroyed.
 
@@ skipping 37 matching lines @@
                                       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).
 void gtk_preserve_window_delegate_resize(GtkPreserveWindow* widget,
                                          gboolean delegate);
 
 G_END_DECLS
 
-#endif  // GFX_GTK_PRESERVE_WINDOW_H_
+#endif  // UI_GFX_GTK_PRESERVE_WINDOW_H_