services: Cleanup class/struct fwd declarations

services/ui/ws/window_manager_window_tree_factory.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_H_
 #define SERVICES_UI_WS_WINDOW_MANAGER_WINDOW_TREE_FACTORY_H_
 
 #include <stdint.h>
 
 #include "mojo/public/cpp/bindings/binding.h"
 #include "services/ui/public/interfaces/window_manager_window_tree_factory.mojom.h"
 #include "services/ui/ws/user_id.h"
 
 namespace ui {
 namespace ws {
 
-class ServerWindow;
 class WindowManagerWindowTreeFactorySet;
 class WindowServer;
 class WindowTree;
 
 // Implementation of mojom::WindowManagerWindowTreeFactory.
 class WindowManagerWindowTreeFactory
     : public mojom::WindowManagerWindowTreeFactory {
  public:
   WindowManagerWindowTreeFactory(
       WindowManagerWindowTreeFactorySet* window_manager_window_tree_factory_set,
@@ skipping 25 matching lines @@
   // Owned by WindowServer.
   WindowTree* window_tree_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowManagerWindowTreeFactory);
 };
 
 }  // namespace ws
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_WINDOW_MANAGER_WINDOW_TREE_FACTORY_H_