Gtk3 ui: Add libgtk3ui as a separate build component

chrome/browser/ui/libgtkui/gtk2_util.h

Index: chrome/browser/ui/libgtkui/gtk2_util.h
diff --git a/chrome/browser/ui/libgtk2ui/gtk2_util.h b/chrome/browser/ui/libgtkui/gtk2_util.h
similarity index 87%
rename from chrome/browser/ui/libgtk2ui/gtk2_util.h
rename to chrome/browser/ui/libgtkui/gtk2_util.h
index 92d06d16f2bc90d8a9487e5d4b5996fc2c4d9bd7..35295737a8b806b4fb3b54ee2accf04a006d9762 100644
--- a/chrome/browser/ui/libgtk2ui/gtk2_util.h
+++ b/chrome/browser/ui/libgtkui/gtk2_util.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_GTK2_UTIL_H_
-#define CHROME_BROWSER_UI_LIBGTK2UI_GTK2_UTIL_H_
+#ifndef CHROME_BROWSER_UI_LIBGTKUI_GTK2_UTIL_H_
+#define CHROME_BROWSER_UI_LIBGTKUI_GTK2_UTIL_H_
 
 #include <gtk/gtk.h>
 #include <string>
@@ -25,7 +25,7 @@ namespace ui {
 class Accelerator;
 }
 
-namespace libgtk2ui {
+namespace libgtkui {
 
 void GtkInitFromCommandLine(const base::CommandLine& command_line);
 
@@ -53,6 +53,6 @@ aura::Window* GetAuraTransientParent(GtkWidget* dialog);
 // Clears the transient parent for |dialog|.
 void ClearAuraTransientParent(GtkWidget* dialog);
 
-}  // namespace libgtk2ui
+}  // namespace libgtkui
 
-#endif  // CHROME_BROWSER_UI_LIBGTK2UI_GTK2_UTIL_H_
+#endif  // CHROME_BROWSER_UI_LIBGTKUI_GTK2_UTIL_H_