Introduce DEFINE_RENDER_OBJECT_TYPE_CASTS to replace manual toRenderFoo, and use it

Source/core/rendering/RenderDetailsMarker.h

Index: Source/core/rendering/RenderDetailsMarker.h
diff --git a/Source/core/rendering/RenderDetailsMarker.h b/Source/core/rendering/RenderDetailsMarker.h
index 8fa0f7e27cc435d2979909b2a5025a8f5f6e66b2..aa996c818a2a45e72344c7f5a214393af5147c2e 100644
--- a/Source/core/rendering/RenderDetailsMarker.h
+++ b/Source/core/rendering/RenderDetailsMarker.h
@@ -44,20 +44,7 @@ private:
     Path getPath(const LayoutPoint& origin) const;
 };
 
-inline RenderDetailsMarker* toRenderDetailsMarker(RenderObject* object)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isDetailsMarker());
-    return static_cast<RenderDetailsMarker*>(object);
-}
-
-inline const RenderDetailsMarker* toRenderDetailsMarker(const RenderObject* object)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isDetailsMarker());
-    return static_cast<const RenderDetailsMarker*>(object);
-}
-
-// This will catch anyone doing an unnecessary cast.
-void toRenderDetailsMarker(const RenderDetailsMarker*);
+DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderDetailsMarker, isDetailsMarker());
 
 }