Introduce DEFINE_RENDER_OBJECT_TYPE_CASTS to replace manual toRenderFoo, and use it

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
@@ skipping 31 matching lines @@
 
     virtual bool supportsPartialLayout() const OVERRIDE { return false; }
 
     virtual const char* renderName() const { return "RenderMeter"; }
     virtual bool isMeter() const { return true; }
     virtual bool requiresForcedStyleRecalcPropagation() const { return true; }
 
     double valueRatio() const;
 };
 
-inline RenderMeter* toRenderMeter(RenderObject* object)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isMeter());
-    return static_cast<RenderMeter*>(object);
-}
-
-// This will catch anyone doing an unnecessary cast.
-void toRenderMeter(const RenderMeter*);
+DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderMeter, isMeter());
 
 } // namespace WebCore
 
 #endif // RenderMeter_h