services: Cleanup class/struct fwd declarations

services/ui/ws/event_dispatcher.h

 // Copyright 2015 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_EVENT_DISPATCHER_H_
 #define SERVICES_UI_WS_EVENT_DISPATCHER_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 15 matching lines @@
 class LocatedEvent;
 
 namespace ws {
 
 class Accelerator;
 class DragController;
 class DragSource;
 class DragTargetConnection;
 class EventDispatcherDelegate;
 class ServerWindow;
-class WindowTree;
 
 namespace test {
 class EventDispatcherTestApi;
 }
 
 // Handles dispatching events to the right location as well as updating focus.
 class EventDispatcher : public ServerWindowObserver, public DragCursorUpdater {
  public:
   enum class AcceleratorMatchPhase {
     // Both pre and post should be considered.
@@ skipping 225 matching lines @@
       AcceleratorMatchPhase::ANY;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(EventDispatcher);
 };
 
 }  // namespace ws
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_EVENT_DISPATCHER_H_