Introduce DEFINE_RENDER_OBJECT_TYPE_CASTS to replace manual toRenderFoo, and use it

Source/core/rendering/svg/RenderSVGInlineText.h

Index: Source/core/rendering/svg/RenderSVGInlineText.h
diff --git a/Source/core/rendering/svg/RenderSVGInlineText.h b/Source/core/rendering/svg/RenderSVGInlineText.h
index 8ce8fd2b0ebd5594382a990892ca9fe1aea87bef..1cbebb7d7578f288e7ac38410f015c7516ed5d6c 100644
--- a/Source/core/rendering/svg/RenderSVGInlineText.h
+++ b/Source/core/rendering/svg/RenderSVGInlineText.h
@@ -65,20 +65,7 @@ private:
     SVGTextLayoutAttributes m_layoutAttributes;
 };
 
-inline RenderSVGInlineText* toRenderSVGInlineText(RenderObject* object)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isSVGInlineText());
-    return static_cast<RenderSVGInlineText*>(object);
-}
-
-inline const RenderSVGInlineText* toRenderSVGInlineText(const RenderObject* object)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isSVGInlineText());
-    return static_cast<const RenderSVGInlineText*>(object);
-}
-
-// This will catch anyone doing an unnecessary cast.
-void toRenderSVGInlineText(const RenderSVGInlineText*);
+DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderSVGInlineText, isSVGInlineText());
 
 }