Smaller vtbls in RenderObject

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 18 matching lines @@
 
 // Each RenderFileUploadControl contains a RenderButton (for opening the file chooser), and
 // sufficient space to draw a file icon and filename. The RenderButton has a shadow node
 // associated with it to receive click/hover events.
 
 class RenderFileUploadControl final : public RenderBlockFlow {
 public:
     RenderFileUploadControl(HTMLInputElement*);
     virtual ~RenderFileUploadControl();
 
-    virtual bool isFileUploadControl() const override { return true; }
+    virtual bool isOfType(RenderObjectType type) const override { return type == RenderObjectFileUploadControl || RenderBlockFlow::isOfType(type); }
 
     String buttonValue();
     String fileTextValue() const;
 
     HTMLInputElement* uploadButton() const;
     int uploadButtonWidth();
 
     static const int afterButtonSpacing = 4;
 
 private:
     virtual const char* renderName() const override { return "RenderFileUploadControl"; }
 
     virtual void updateFromElement() override;
     virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const override;
     virtual void computePreferredLogicalWidths() override;
     virtual void paintObject(PaintInfo&, const LayoutPoint&) override;
 
     int maxFilenameWidth() const;
 
     virtual PositionWithAffinity positionForPoint(const LayoutPoint&) override;
 
     bool m_canReceiveDroppedFiles;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderFileUploadControl, isFileUploadControl());
 
 } // namespace blink
 
 #endif // RenderFileUploadControl_h