Make the CSS interface members static

Source/core/frame/LocalDOMWindow.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 1284 matching lines @@
         return d->requestAnimationFrame(callback);
     return 0;
 }
 
 void LocalDOMWindow::cancelAnimationFrame(int id)
 {
     if (Document* d = document())
         d->cancelAnimationFrame(id);
 }
 
-DOMWindowCSS* LocalDOMWindow::css() const
-{
-    if (!m_css)
-        m_css = DOMWindowCSS::create();
-    return m_css.get();
-}
-
 bool LocalDOMWindow::addEventListener(const AtomicString& eventType, PassRefPtr<EventListener> prpListener, bool useCapture)
 {
     RefPtr<EventListener> listener = prpListener;
     if (!EventTarget::addEventListener(eventType, listener, useCapture))
         return false;
 
     if (frame() && frame()->host())
         frame()->host()->eventHandlerRegistry().didAddEventHandler(*this, eventType);
 
     if (Document* document = this->document()) {
@@ skipping 191 matching lines @@
     DOMWindow::trace(visitor);
     DOMWindowLifecycleNotifier::trace(visitor);
 }
 
 LocalFrame* LocalDOMWindow::frame() const
 {
     return m_frameObserver->frame();
 }
 
 } // namespace blink