Merge RenderWidget into single subclass, RenderPart

Source/core/rendering/RenderMeter.h

 /*
  * Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
  *
  * 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
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef RenderMeter_h
 #define RenderMeter_h
 
 #include "core/rendering/RenderBlockFlow.h"
-#include "core/rendering/RenderWidget.h"
 
 namespace blink {
 
 class HTMLMeterElement;
 
 class RenderMeter final : public RenderBlockFlow {
 public:
     explicit RenderMeter(HTMLElement*);
     virtual ~RenderMeter();
 
     HTMLMeterElement* meterElement() const;
     virtual void updateFromElement() override;
 
 private:
     virtual void updateLogicalWidth() override;
     virtual void computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logicalTop, LogicalExtentComputedValues&) const override;
 
     virtual const char* renderName() const override { return "RenderMeter"; }
     virtual bool isMeter() const override { return true; }
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderMeter, isMeter());
 
 } // namespace blink
 
 #endif // RenderMeter_h