Removing deprecated GTK-Views code.

ui/views/focus/accelerator_handler_gtk.cc

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "ui/views/focus/accelerator_handler.h"
-
-#include <gtk/gtk.h>
-
-#include "ui/views/focus/focus_manager.h"
-
-namespace views {
-
-AcceleratorHandler::AcceleratorHandler() {}
-
-bool AcceleratorHandler::Dispatch(GdkEvent* event) {
-  // The logic for handling keyboard accelerators has been moved into
-  // NativeWidgetGtk::OnEventKey handler (views/widget/widget_gtk.cc).
-  gtk_main_do_event(event);
-  return true;
-}
-
-}  // namespace views