Removing deprecated GTK-Views code.

ui/views/widget/native_widget_test_utils_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/widget/native_widget_test_utils.h"
-
-#include "ui/views/view.h"
-#include "ui/views/widget/native_widget_private.h"
-#include "ui/views/widget/widget.h"
-
-namespace views {
-namespace internal {
-
-namespace {
-
-NativeWidgetPrivate* CreateNativeWidgetOfType(Widget::InitParams::Type type) {
-  Widget* widget = new Widget;
-  Widget::InitParams params(type);
-  params.ownership = views::Widget::InitParams::NATIVE_WIDGET_OWNS_WIDGET;
-  params.bounds = gfx::Rect(10, 10, 200, 200);
-  widget->Init(params);
-  return widget->native_widget_private();
-}
-
-}  // namespace
-
-NativeWidgetPrivate* CreateNativeWidget() {
-  return CreateNativeWidgetOfType(Widget::InitParams::TYPE_POPUP);
-}
-
-NativeWidgetPrivate* CreateNativeSubWidget() {
-  return CreateNativeWidgetOfType(Widget::InitParams::TYPE_CONTROL);
-}
-
-}  // namespace internal
-}  // namespace ui