Move enum MenuAnchorPosition to reduce deps on menu_item_view.h

ui/views/examples/tree_view_example.cc

 // Copyright (c) 2012 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/examples/tree_view_example.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "ui/views/controls/button/label_button.h"
 #include "ui/views/controls/menu/menu_model_adapter.h"
 #include "ui/views/controls/menu/menu_runner.h"
@@ skipping 114 matching lines @@
 }
 
 void TreeViewExample::ShowContextMenuForView(View* source,
                                              const gfx::Point& point,
                                              ui::MenuSourceType source_type) {
   ui::SimpleMenuModel context_menu_model(this);
   context_menu_model.AddItem(ID_EDIT, ASCIIToUTF16("Edit"));
   context_menu_model.AddItem(ID_REMOVE, ASCIIToUTF16("Remove"));
   context_menu_model.AddItem(ID_ADD, ASCIIToUTF16("Add"));
   context_menu_runner_.reset(new MenuRunner(&context_menu_model));
-  if (context_menu_runner_->RunMenuAt(source->GetWidget(), NULL,
-      gfx::Rect(point, gfx::Size()), MenuItemView::TOPLEFT, source_type, 0) ==
-      MenuRunner::MENU_DELETED)
+  if (context_menu_runner_->RunMenuAt(source->GetWidget(),
+                                      NULL,
+                                      gfx::Rect(point, gfx::Size()),
+                                      MENU_ANCHOR_TOPLEFT,
+                                      source_type,
+                                      0) == MenuRunner::MENU_DELETED) {
     return;
+  }
 }
 
 bool TreeViewExample::IsCommandIdChecked(int command_id) const {
   return false;
 }
 
 bool TreeViewExample::IsCommandIdEnabled(int command_id) const {
   return const_cast<TreeViewExample*>(this)->IsCommandIdEnabled(command_id);
 }
 
@@ skipping 16 matching lines @@
     case ID_ADD:
       AddNewNode();
       break;
     default:
       NOTREACHED();
   }
 }
 
 }  // namespace examples
 }  // namespace views