Add infrastructure for partial layouts

Source/core/rendering/RenderFileUploadControl.h

 /*
  * Copyright (C) 2006, 2007, 2009, 2012 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 34 matching lines @@
     virtual const char* renderName() const { return "RenderFileUploadControl"; }
 
     virtual bool canBeReplacedWithInlineRunIn() const OVERRIDE;
     virtual void updateFromElement();
     virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const OVERRIDE;
     virtual void computePreferredLogicalWidths();
     virtual void paintObject(PaintInfo&, const LayoutPoint&);
 
     virtual bool requiresForcedStyleRecalcPropagation() const { return true; }
 
+    virtual bool supportsPartialLayout() const OVERRIDE { return false; }
+
     int maxFilenameWidth() const;
 
     virtual PositionWithAffinity positionForPoint(const LayoutPoint&) OVERRIDE FINAL;
 
     HTMLInputElement* uploadButton() const;
 
     bool m_canReceiveDroppedFiles;
 };
 
 inline RenderFileUploadControl* toRenderFileUploadControl(RenderObject* object)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isFileUploadControl());
     return static_cast<RenderFileUploadControl*>(object);
 }
 
 inline const RenderFileUploadControl* toRenderFileUploadControl(const RenderObject* object)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isFileUploadControl());
     return static_cast<const RenderFileUploadControl*>(object);
 }
 
 // This will catch anyone doing an unnecessary cast.
 void toRenderFileUploadControl(const RenderFileUploadControl*);
 
 } // namespace WebCore
 
 #endif // RenderFileUploadControl_h