Move PlatformScreen, PlatformScreenChromium, and Widget to Source/platform

Source/core/plugins/PluginOcclusionSupport.cpp

 /*
  * Copyright (C) 2011 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 19 matching lines @@
 
 #include "config.h"
 #include "core/plugins/PluginOcclusionSupport.h"
 
 #include "HTMLNames.h"
 #include "core/dom/Element.h"
 #include "core/html/HTMLElement.h"
 #include "core/html/HTMLFrameOwnerElement.h"
 #include "core/frame/Frame.h"
 #include "core/frame/FrameView.h"
-#include "core/platform/Widget.h"
 #include "core/rendering/RenderBox.h"
 #include "core/rendering/RenderObject.h"
+#include "platform/Widget.h"
 #include "wtf/HashSet.h"
 
 // This file provides a utility function to support rendering certain elements above plugins.
 
 namespace WebCore {
 
 static void getObjectStack(const RenderObject* ro, Vector<const RenderObject*>* roStack)
 {
     roStack->clear();
     while (ro) {
@@ skipping 140 matching lines @@
     // as being in the top layer.
     const Element* ancestor = topLayerAncestor(element);
     Document* document = parentFrameView->frame().document();
     const Vector<RefPtr<Element> >& elements = document->topLayerElements();
     size_t start = ancestor ? elements.find(ancestor) + 1 : 0;
     for (size_t i = start; i < elements.size(); ++i)
         addTreeToOcclusions(elements[i]->renderer(), frameRect, occlusions);
 }
 
 } // namespace WebCore