Gtk3 ui: Add libgtk3ui as a separate build component

chrome/browser/ui/libgtkui/gtk2_util.cc

Index: chrome/browser/ui/libgtkui/gtk2_util.cc
diff --git a/chrome/browser/ui/libgtk2ui/gtk2_util.cc b/chrome/browser/ui/libgtkui/gtk2_util.cc
similarity index 97%
rename from chrome/browser/ui/libgtk2ui/gtk2_util.cc
rename to chrome/browser/ui/libgtkui/gtk2_util.cc
index 6aceaf3e6180557664e93f63db715b2f34b6d1d2..4ea77e0187d717e3deaac5d2f59b9dbae1246754 100644
--- a/chrome/browser/ui/libgtk2ui/gtk2_util.cc
+++ b/chrome/browser/ui/libgtkui/gtk2_util.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/gtk2_util.h"
+#include "chrome/browser/ui/libgtkui/gtk2_util.h"
 
 #include <gdk/gdk.h>
 #include <gdk/gdkx.h>
@@ -50,7 +50,7 @@ void CommonInitFromCommandLine(const base::CommandLine& command_line,
 
 }  // namespace
 
-namespace libgtk2ui {
+namespace libgtkui {
 
 void GtkInitFromCommandLine(const base::CommandLine& command_line) {
   CommonInitFromCommandLine(command_line, gtk_init);
@@ -141,4 +141,4 @@ void ClearAuraTransientParent(GtkWidget* dialog) {
   g_object_set_data(G_OBJECT(dialog), kAuraTransientParent, NULL);
 }
 
-}  // namespace libgtk2ui
+}  // namespace libgtkui