Remove CreateDefaultDisplay().

services/ui/ws/window_manager_window_tree_factory_set.h

 // Copyright 2016 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_MANAGER_WINDOW_TREE_FACTORY_SET_H_
 #define SERVICES_UI_WS_WINDOW_MANAGER_WINDOW_TREE_FACTORY_SET_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 57 matching lines @@
   friend class test::WindowManagerWindowTreeFactorySetTestApi;
 
   // Called by WindowManagerWindowTreeFactory when CreateWindowTree() has
   // been called.
   void OnWindowManagerWindowTreeFactoryReady(
       WindowManagerWindowTreeFactory* factory);
 
   // UserIdTrackerObserver:
   void OnUserIdRemoved(const UserId& id) override;
 
-  // Set to true the first time a valid factory has been found.
-  bool got_valid_factory_ = false;
   UserIdTracker* id_tracker_;
   WindowServer* window_server_;
 
   std::map<UserId, std::unique_ptr<WindowManagerWindowTreeFactory>> factories_;
 
   base::ObserverList<WindowManagerWindowTreeFactorySetObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowManagerWindowTreeFactorySet);
 };
 
 }  // namespace ws
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_WINDOW_MANAGER_WINDOW_TREE_FACTORY_SET_H_