Introduce DEFINE_RENDER_OBJECT_TYPE_CASTS to replace manual toRenderFoo, and use it

Source/core/rendering/RenderTextControl.h

Index: Source/core/rendering/RenderTextControl.h
diff --git a/Source/core/rendering/RenderTextControl.h b/Source/core/rendering/RenderTextControl.h
index e4af77a46ea2e19fb6bb4205df9a2b9358b7774c..c86f43f60d3f2595b17816263f8bcdf203daea28 100644
--- a/Source/core/rendering/RenderTextControl.h
+++ b/Source/core/rendering/RenderTextControl.h
@@ -89,20 +89,7 @@ private:
     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