Introduce DEFINE_RENDER_OBJECT_TYPE_CASTS to replace manual toRenderFoo, and use it

Source/core/rendering/RenderProgress.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 41 matching lines @@
     void updateAnimationState();
 
     double m_position;
     double m_animationStartTime;
     double m_animationRepeatInterval;
     double m_animationDuration;
     bool m_animating;
     Timer<RenderProgress> m_animationTimer;
 };
 
-inline RenderProgress* toRenderProgress(RenderObject* object)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isProgress());
-    return static_cast<RenderProgress*>(object);
-}
-
-// This will catch anyone doing an unnecessary cast.
-void toRenderProgress(const RenderProgress*);
+DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderProgress, isProgress());
 
 } // namespace WebCore
 
 #endif // RenderProgress_h