services: Cleanup class/struct fwd declarations

services/ui/ws/window_manager_display_root.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_DISPLAY_ROOT_H_
 #define SERVICES_UI_WS_WINDOW_MANAGER_DISPLAY_ROOT_H_
 
 #include <stdint.h>
 
 #include <memory>
 
 #include "base/macros.h"
 
 namespace ui {
 namespace ws {
 
 class Display;
 class ServerWindow;
 class WindowManagerState;
 class WindowServer;
 
-namespace test {
-class WindowManagerDisplayRootTestApi;
-}
-
 // Owns the root window of a window manager for one display. Each window manager
 // has one WindowManagerDisplayRoot for each Display. The root window is
 // parented to the root of a Display.
 class WindowManagerDisplayRoot {
  public:
   explicit WindowManagerDisplayRoot(Display* display);
   ~WindowManagerDisplayRoot();
 
   ServerWindow* root() { return root_.get(); }
   const ServerWindow* root() const { return root_.get(); }
@@ skipping 18 matching lines @@
   std::unique_ptr<ServerWindow> root_;
   WindowManagerState* window_manager_state_ = nullptr;
 
   DISALLOW_COPY_AND_ASSIGN(WindowManagerDisplayRoot);
 };
 
 }  // namespace ws
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_WINDOW_MANAGER_DISPLAY_ROOT_H_