Move enum MenuAnchorPosition to reduce deps on menu_item_view.h

ash/shell/window_type_launcher.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 "ash/shell/window_type_launcher.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/screensaver/screensaver_view.h"
 #include "ash/session/session_state_delegate.h"
 #include "ash/shelf/shelf_widget.h"
@@ skipping 369 matching lines @@
     ui::MenuSourceType source_type) {
   MenuItemView* root = new MenuItemView(this);
   root->AppendMenuItem(COMMAND_NEW_WINDOW,
                        base::ASCIIToUTF16("New Window"),
                        MenuItemView::NORMAL);
   root->AppendMenuItem(COMMAND_TOGGLE_FULLSCREEN,
                        base::ASCIIToUTF16("Toggle FullScreen"),
                        MenuItemView::NORMAL);
   // MenuRunner takes ownership of root.
   menu_runner_.reset(new MenuRunner(root));
-  if (menu_runner_->RunMenuAt(GetWidget(), NULL,
-        gfx::Rect(point, gfx::Size()),
-        MenuItemView::TOPLEFT,
-        source_type,
-        MenuRunner::HAS_MNEMONICS | views::MenuRunner::CONTEXT_MENU) ==
-        MenuRunner::MENU_DELETED)
+  if (menu_runner_->RunMenuAt(
+          GetWidget(),
+          NULL,
+          gfx::Rect(point, gfx::Size()),
+          views::MENU_ANCHOR_TOPLEFT,
+          source_type,
+          MenuRunner::HAS_MNEMONICS | views::MenuRunner::CONTEXT_MENU) ==
+      MenuRunner::MENU_DELETED) {
     return;
+  }
 }
 
 }  // namespace shell
 }  // namespace ash