Introduce DEFINE_RENDER_OBJECT_TYPE_CASTS to replace manual toRenderFoo, and use it

Source/core/rendering/RenderMarquee.h

Index: Source/core/rendering/RenderMarquee.h
diff --git a/Source/core/rendering/RenderMarquee.h b/Source/core/rendering/RenderMarquee.h
index 0859d96d0ff6b6be0752678597dda7553fa7dcda..ab37ed8fd2e9d5f0bf7a6ce742e4eb9325813b67 100644
--- a/Source/core/rendering/RenderMarquee.h
+++ b/Source/core/rendering/RenderMarquee.h
@@ -105,20 +105,7 @@ private:
     EMarqueeDirection m_direction : 4;
 };
 
-inline RenderMarquee* toRenderMarquee(RenderObject* renderer)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!renderer || renderer->isMarquee());
-    return static_cast<RenderMarquee*>(renderer);
-}
-
-inline const RenderMarquee* toRenderMarquee(const RenderObject* renderer)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!renderer || renderer->isMarquee());
-    return static_cast<const RenderMarquee*>(renderer);
-}
-
-// Catch unneeded cast.
-void toRenderMarquee(const RenderMarquee*);
+DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderMarquee, isMarquee());
 
 } // namespace WebCore