Introduce DEFINE_RENDER_OBJECT_TYPE_CASTS to replace manual toRenderFoo, and use it

Source/core/rendering/RenderTextControl.h

 /*
  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
  *           (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * 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,
@@ skipping 71 matching lines @@
 
     virtual void addChild(RenderObject* newChild, RenderObject* beforeChild = 0) OVERRIDE FINAL;
 
     virtual void addFocusRingRects(Vector<IntRect>&, const LayoutPoint& additionalOffset, const RenderLayerModelObject* paintContainer = 0) OVERRIDE;
 
     virtual bool canBeProgramaticallyScrolled() const { return true; }
 
     virtual bool requiresForcedStyleRecalcPropagation() const { return true; }
 };
 
-inline RenderTextControl* toRenderTextControl(RenderObject* object)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isTextControl());
-    return static_cast<RenderTextControl*>(object);
-}
-
-inline const RenderTextControl* toRenderTextControl(const RenderObject* object)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isTextControl());
-    return static_cast<const RenderTextControl*>(object);
-}
-
-// This will catch anyone doing an unnecessary cast.
-void toRenderTextControl(const RenderTextControl*);
+DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderTextControl, isTextControl());
 
 // Renderer for our inner container, for <search> and others.
 // We can't use RenderFlexibleBox directly, because flexboxes have a different
 // baseline definition, and then inputs of different types wouldn't line up
 // anymore.
 class RenderTextControlInnerContainer FINAL : public RenderFlexibleBox {
 public:
     explicit RenderTextControlInnerContainer(Element* element)
         : RenderFlexibleBox(element)
     { }
     virtual ~RenderTextControlInnerContainer() { }
 
     virtual int baselinePosition(FontBaseline baseline, bool firstLine, LineDirectionMode direction, LinePositionMode position) const OVERRIDE
     {
         return RenderBlock::baselinePosition(baseline, firstLine, direction, position);
     }
     virtual int firstLineBoxBaseline() const OVERRIDE { return RenderBlock::firstLineBoxBaseline(); }
     virtual int inlineBlockBaseline(LineDirectionMode direction) const OVERRIDE { return lastLineBoxBaseline(direction); }
     virtual bool supportsPartialLayout() const OVERRIDE { return false; }
 };
 
 
 } // namespace WebCore
 
 #endif // RenderTextControl_h