Gtk3 ui: Add libgtk3ui as a separate build component

chrome/browser/ui/libgtkui/gconf_listener.cc

Index: chrome/browser/ui/libgtkui/gconf_listener.cc
diff --git a/chrome/browser/ui/libgtk2ui/gconf_listener.cc b/chrome/browser/ui/libgtkui/gconf_listener.cc
similarity index 97%
rename from chrome/browser/ui/libgtk2ui/gconf_listener.cc
rename to chrome/browser/ui/libgtkui/gconf_listener.cc
index 969910fce227d4312d4b35110ef8e575ec6a161f..a9b504b63fb1a9968c5ef737711505f196e629de 100644
--- a/chrome/browser/ui/libgtk2ui/gconf_listener.cc
+++ b/chrome/browser/ui/libgtkui/gconf_listener.cc
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "chrome/browser/ui/libgtk2ui/gconf_listener.h"
+#include "chrome/browser/ui/libgtkui/gconf_listener.h"
 
 #include <gtk/gtk.h>
 
@@ -14,7 +14,7 @@
 #include "base/nix/xdg_util.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_tokenizer.h"
-#include "chrome/browser/ui/libgtk2ui/gtk2_ui.h"
+#include "chrome/browser/ui/libgtkui/gtk2_ui.h"
 #include "ui/base/x/x11_util.h"
 #include "ui/views/window/frame_buttons.h"
 
@@ -38,7 +38,7 @@ const char kDefaultButtonString[] = ":minimize,maximize,close";
 
 }  // namespace
 
-namespace libgtk2ui {
+namespace libgtkui {
 
 // Public interface:
 
@@ -185,4 +185,4 @@ void GConfListener::ParseAndStoreMiddleClickValue(GConfValue* gconf_value) {
   delegate_->SetNonClientMiddleClickAction(action);
 }
 
-}  // namespace libgtk2ui
+}  // namespace libgtkui