Makes WindowTree::DeleteWindow() unembed for roots

services/ui/ws/window_server.h

 // Copyright 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.
 
 #ifndef SERVICES_UI_WS_WINDOW_SERVER_H_
 #define SERVICES_UI_WS_WINDOW_SERVER_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 176 matching lines @@
                              const ServerWindow* old_capture);
   void ProcessWillChangeWindowHierarchy(const ServerWindow* window,
                                         const ServerWindow* new_parent,
                                         const ServerWindow* old_parent);
   void ProcessWindowHierarchyChanged(const ServerWindow* window,
                                      const ServerWindow* new_parent,
                                      const ServerWindow* old_parent);
   void ProcessWindowReorder(const ServerWindow* window,
                             const ServerWindow* relative_window,
                             const mojom::OrderDirection direction);
-  void ProcessWindowDeleted(const ServerWindow* window);
+  void ProcessWindowDeleted(ServerWindow* window);
   void ProcessWillChangeWindowPredefinedCursor(ServerWindow* window,
                                                int32_t cursor_id);
 
   // Sends an |event| to all WindowTrees belonging to |user_id| that might be
   // observing events. Skips |ignore_tree| if it is non-null. |target_window| is
   // the target of the event.
   void SendToPointerWatchers(const ui::Event& event,
                              const UserId& user_id,
                              ServerWindow* target_window,
                              WindowTree* ignore_tree);
@@ skipping 178 matching lines @@
 
   WindowManagerWindowTreeFactorySet window_manager_window_tree_factory_set_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowServer);
 };
 
 }  // namespace ws
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_WINDOW_SERVER_H_