Makes WindowTree::DeleteWindow() unembed for roots

services/ui/ws/window_server.cc

 // 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.
 
 #include "services/ui/ws/window_server.h"
 
 #include <set>
 #include <string>
 
 #include "base/logging.h"
@@ skipping 404 matching lines @@
       (current_operation_type() ==
        OperationType::REMOVE_TRANSIENT_WINDOW_FROM_PARENT)) {
     return;
   }
   for (auto& pair : tree_map_) {
     pair.second->ProcessWindowReorder(window, relative_window, direction,
                                       IsOperationSource(pair.first));
   }
 }
 
-void WindowServer::ProcessWindowDeleted(const ServerWindow* window) {
+void WindowServer::ProcessWindowDeleted(ServerWindow* window) {
   for (auto& pair : tree_map_)
     pair.second->ProcessWindowDeleted(window, IsOperationSource(pair.first));
 }
 
 void WindowServer::ProcessWillChangeWindowPredefinedCursor(ServerWindow* window,
                                                            int32_t cursor_id) {
   for (auto& pair : tree_map_) {
     pair.second->ProcessCursorChanged(window, cursor_id,
                                       IsOperationSource(pair.first));
   }
@@ skipping 392 matching lines @@
   clipboard_map_[id] = base::MakeUnique<clipboard::ClipboardImpl>();
 }
 
 void WindowServer::OnUserIdRemoved(const UserId& id) {
   activity_monitor_map_.erase(id);
   clipboard_map_.erase(id);
 }
 
 }  // namespace ws
 }  // namespace ui