Revert of Allows menu host windows to be enumerated in DragTargetWindowFinder

ui/base/x/x11_menu_list.cc

Index: ui/base/x/x11_menu_list.cc
diff --git a/ui/base/x/x11_menu_list.cc b/ui/base/x/x11_menu_list.cc
deleted file mode 100644
index 3396e57840edc352b244cd231bbbfc4bf29825f6..0000000000000000000000000000000000000000
--- a/ui/base/x/x11_menu_list.cc
+++ /dev/null
@@ -1,46 +0,0 @@
-// Copyright (c) 2014 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/base/x/x11_menu_list.h"
-
-#include "base/memory/singleton.h"
-#include "ui/base/x/x11_util.h"
-
-namespace ui {
-
-// static
-XMenuList* XMenuList::GetInstance() {
-  return Singleton<XMenuList>::get();
-}
-
-XMenuList::XMenuList()
-    : menu_type_atom_(GetAtom("_NET_WM_WINDOW_TYPE_MENU")) {
-}
-
-XMenuList::~XMenuList() {
-  menus_.clear();
-}
-
-void XMenuList::MaybeRegisterMenu(XID menu) {
-  int value = 0;
-  if (!GetIntProperty(menu, "_NET_WM_WINDOW_TYPE", &value) ||
-      static_cast<Atom>(value) != menu_type_atom_) {
-    return;
-  }
-  menus_.push_back(menu);
-}
-
-void XMenuList::MaybeUnregisterMenu(XID menu) {
-  std::vector<XID>::iterator iter = std::find(menus_.begin(), menus_.end(),
-                                              menu);
-  if (iter == menus_.end())
-    return;
-  menus_.erase(iter);
-}
-
-void XMenuList::InsertMenuWindowXIDs(std::vector<XID>* stack) {
-  stack->insert(stack->begin(), menus_.begin(), menus_.end());
-}
-
-}  // namespace ui