Gtk3 ui: Add libgtk3ui as a separate build component

chrome/browser/ui/libgtkui/gconf_listener.h

Index: chrome/browser/ui/libgtkui/gconf_listener.h
diff --git a/chrome/browser/ui/libgtk2ui/gconf_listener.h b/chrome/browser/ui/libgtkui/gconf_listener.h
similarity index 85%
rename from chrome/browser/ui/libgtk2ui/gconf_listener.h
rename to chrome/browser/ui/libgtkui/gconf_listener.h
index 98bd694a987034867367278b2dd95691fa33f21e..6afe75030cd1a194852e1aee8b7c7dd1214cf430 100644
--- a/chrome/browser/ui/libgtk2ui/gconf_listener.h
+++ b/chrome/browser/ui/libgtkui/gconf_listener.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CHROME_BROWSER_UI_LIBGTK2UI_GCONF_LISTENER_H_
-#define CHROME_BROWSER_UI_LIBGTK2UI_GCONF_LISTENER_H_
+#ifndef CHROME_BROWSER_UI_LIBGTKUI_GCONF_LISTENER_H_
+#define CHROME_BROWSER_UI_LIBGTKUI_GCONF_LISTENER_H_
 
 #include <gconf/gconf-client.h>
 #include <gtk/gtk.h>
@@ -13,9 +13,9 @@
 
 #include "base/callback_forward.h"
 #include "base/macros.h"
-#include "chrome/browser/ui/libgtk2ui/gtk2_signal.h"
+#include "chrome/browser/ui/libgtkui/gtk2_signal.h"
 
-namespace libgtk2ui {
+namespace libgtkui {
 class Gtk2UI;
 
 // On GNOME desktops, subscribes to the gconf key which controlls button order.
@@ -53,6 +53,6 @@ class GConfListener {
   DISALLOW_COPY_AND_ASSIGN(GConfListener);
 };
 
-}  // namespace libgtk2ui
+}  // namespace libgtkui
 
-#endif  // CHROME_BROWSER_UI_LIBGTK2UI_GCONF_LISTENER_H_
+#endif  // CHROME_BROWSER_UI_LIBGTKUI_GCONF_LISTENER_H_