Clean up forward declarations in Source/web

Source/web/WebPopupMenuImpl.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 22 matching lines @@
 
 #include "public/platform/WebContentLayerClient.h"
 #include "public/platform/WebPoint.h"
 #include "public/platform/WebSize.h"
 #include "public/web/WebPopupMenu.h"
 #include "web/PopupContainerClient.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/RefCounted.h"
 
 namespace blink {
-class LocalFrame;
-class KeyboardEvent;
-class Page;
-class PlatformKeyboardEvent;
-class Range;
 class WebContentLayer;
 class WebGestureEvent;
 class WebKeyboardEvent;
 class WebLayerTreeView;
 class WebMouseEvent;
 class WebMouseWheelEvent;
-class WebRange;
 class WebTouchEvent;
-class Widget;
 struct WebRect;
 
 class WebPopupMenuImpl : public WebPopupMenu, public PopupContainerClient, public WebContentLayerClient, public RefCounted<WebPopupMenuImpl> {
     WTF_MAKE_FAST_ALLOCATED;
 public:
     // WebWidget functions:
     virtual void close() override final;
     virtual WebSize size() override final { return m_size; }
     virtual void willStartLiveResize() override final;
     virtual void resize(const WebSize&) override final;
@@ skipping 68 matching lines @@
 };
 
 DEFINE_TYPE_CASTS(WebPopupMenuImpl, WebWidget, widget, widget->isPopupMenu(), widget.isPopupMenu());
 // WebPopupMenuImpl is the only implementation of PopupContainerClient, so
 // no need for further checking.
 DEFINE_TYPE_CASTS(WebPopupMenuImpl, PopupContainerClient, client, true, true);
 
 } // namespace blink
 
 #endif