Move enum MenuAnchorPosition to reduce deps on menu_item_view.h

ui/app_list/views/app_list_menu_views.cc

 // Copyright 2013 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/app_list/views/app_list_menu_views.h"
 
 #include "grit/ui_resources.h"
 #include "ui/app_list/app_list_view_delegate.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/views/controls/button/menu_button.h"
@@ skipping 13 matching lines @@
   menu_delegate_.reset(new views::MenuModelAdapter(menu_model()));
   menu_ = new MenuItemView(menu_delegate_.get());
   menu_runner_.reset(new views::MenuRunner(menu_));
   menu_delegate_->BuildMenu(menu_);
 }
 
 AppListMenuViews::~AppListMenuViews() {}
 
 void AppListMenuViews::RunMenuAt(views::MenuButton* button,
                                  const gfx::Point& point) {
-  ignore_result(menu_runner_->RunMenuAt(button->GetWidget(), button,
+  ignore_result(menu_runner_->RunMenuAt(button->GetWidget(),
+                                        button,
                                         gfx::Rect(point, gfx::Size()),
-                                        MenuItemView::TOPRIGHT,
-                                        ui::MENU_SOURCE_NONE, 0));
+                                        views::MENU_ANCHOR_TOPRIGHT,
+                                        ui::MENU_SOURCE_NONE,
+                                        0));
 }
 
 void AppListMenuViews::Cancel() {
   menu_runner_->Cancel();
 }
 
 }  // namespace app_list