Removing deprecated GTK-Views code.

ui/views/controls/menu/nested_dispatcher_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/controls/menu/nested_dispatcher_gtk.h"
-
-namespace views {
-
-NestedDispatcherGtk::NestedDispatcherGtk(MessageLoopForUI::Dispatcher* creator,
-                                         bool allow_nested_task)
-  : creator_(creator),
-    allow_nested_task_(allow_nested_task) {
-}
-
-bool NestedDispatcherGtk::RunAndSelfDestruct() {
-  bool nestable = MessageLoopForUI::current()->NestableTasksAllowed();
-  if (allow_nested_task_)
-    MessageLoopForUI::current()->SetNestableTasksAllowed(true);
-  MessageLoopForUI::current()->RunWithDispatcher(this);
-  if (allow_nested_task_)
-    MessageLoopForUI::current()->SetNestableTasksAllowed(nestable);
-  bool creator_is_deleted = creator_ == NULL;
-  delete this;
-  return creator_is_deleted;
-}
-
-void NestedDispatcherGtk::CreatorDestroyed() {
-  creator_ = NULL;
-}
-
-bool NestedDispatcherGtk::Dispatch(GdkEvent* event) {
-  return creator_ && creator_->Dispatch(event);
-}
-
-}  // namespace views