Gtk3 ui: Add libgtk3ui as a separate build component

chrome/browser/ui/libgtkui/gtk2_key_bindings_handler.h

Index: chrome/browser/ui/libgtkui/gtk2_key_bindings_handler.h
diff --git a/chrome/browser/ui/libgtk2ui/gtk2_key_bindings_handler.h b/chrome/browser/ui/libgtkui/gtk2_key_bindings_handler.h
similarity index 95%
rename from chrome/browser/ui/libgtk2ui/gtk2_key_bindings_handler.h
rename to chrome/browser/ui/libgtkui/gtk2_key_bindings_handler.h
index 4c19ee30ab71413e20be54128d6f658ceb536b29..b3f9d033fd59fd3eb1084df5d7368bdfa3dba2bb 100644
--- a/chrome/browser/ui/libgtk2ui/gtk2_key_bindings_handler.h
+++ b/chrome/browser/ui/libgtkui/gtk2_key_bindings_handler.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_KEY_BINDINGS_HANDLER_H_
-#define CHROME_BROWSER_UI_LIBGTK2UI_GTK2_KEY_BINDINGS_HANDLER_H_
+#ifndef CHROME_BROWSER_UI_LIBGTKUI_GTK2_KEY_BINDINGS_HANDLER_H_
+#define CHROME_BROWSER_UI_LIBGTKUI_GTK2_KEY_BINDINGS_HANDLER_H_
 
 #include <gtk/gtk.h>
 
@@ -21,7 +21,7 @@ namespace ui {
 class Event;
 }
 
-namespace libgtk2ui {
+namespace libgtkui {
 
 // This class is a convenience class for handling editor key bindings defined
 // in gtk keyboard theme.
@@ -144,6 +144,6 @@ class Gtk2KeyBindingsHandler {
   bool has_xkb_;
 };
 
-}  // namespace libgtk2ui
+}  // namespace libgtkui
 
-#endif  // CHROME_BROWSER_UI_LIBGTK2UI_GTK2_KEY_BINDINGS_HANDLER_H_
+#endif  // CHROME_BROWSER_UI_LIBGTKUI_GTK2_KEY_BINDINGS_HANDLER_H_