Gtk3 ui: Add libgtk3ui as a separate build component

chrome/browser/ui/libgtkui/gtk2_key_bindings_handler.cc

Index: chrome/browser/ui/libgtkui/gtk2_key_bindings_handler.cc
diff --git a/chrome/browser/ui/libgtk2ui/gtk2_key_bindings_handler.cc b/chrome/browser/ui/libgtkui/gtk2_key_bindings_handler.cc
similarity index 98%
rename from chrome/browser/ui/libgtk2ui/gtk2_key_bindings_handler.cc
rename to chrome/browser/ui/libgtkui/gtk2_key_bindings_handler.cc
index dc967ae0351f715cdd674e207aadc50d5d2b2bb6..7abde41eca5c8c109c9264fa3f03c909b8e3f079 100644
--- a/chrome/browser/ui/libgtk2ui/gtk2_key_bindings_handler.cc
+++ b/chrome/browser/ui/libgtkui/gtk2_key_bindings_handler.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_key_bindings_handler.h"
+#include "chrome/browser/ui/libgtkui/gtk2_key_bindings_handler.h"
 
 #include <gdk/gdkkeysyms.h>
 #include <X11/Xlib.h>
@@ -14,7 +14,7 @@
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/strings/string_util.h"
-#include "chrome/browser/ui/libgtk2ui/gtk2_util.h"
+#include "chrome/browser/ui/libgtkui/gtk2_util.h"
 #include "content/public/browser/native_web_keyboard_event.h"
 #include "ui/base/ime/text_edit_commands.h"
 #include "ui/base/x/x11_util.h"
@@ -26,10 +26,10 @@ using ui::TextEditCommand;
 // in a state that links. This code was adapted from the content layer GTK
 // code, which had some simple unit tests. However, the changes in the public
 // interface basically meant the tests need to be rewritten; this imposes weird
-// linking requirements regarding GTK+ as we don't have a libgtk2ui_unittests
+// linking requirements regarding GTK+ as we don't have a libgtkui_unittests
 // yet. http://crbug.com/358297.
 
-namespace libgtk2ui {
+namespace libgtkui {
 
 Gtk2KeyBindingsHandler::Gtk2KeyBindingsHandler()
     : fake_window_(gtk_offscreen_window_new()),
@@ -436,4 +436,4 @@ void Gtk2KeyBindingsHandler::MoveFocus(GtkWidget* widget,
   // Just for disabling the default handler.
 }
 
-}  // namespace libgtk2ui
+}  // namespace libgtkui