Move hasRenderedNonAnonymousDescendantsWithHeight() to VisibleUnits.cpp from Position.cpp

Source/core/editing/Position.h

Index: Source/core/editing/Position.h
diff --git a/Source/core/editing/Position.h b/Source/core/editing/Position.h
index 08f375b4c8b5c3042948d4a00c34fe875d298f1d..93641a71f136738e3e72fd19692d0ead40c37ac2 100644
--- a/Source/core/editing/Position.h
+++ b/Source/core/editing/Position.h
@@ -434,10 +434,6 @@ inline PositionInComposedTree fromPositionInDOMTree<EditingInComposedTreeStrateg
     return toPositionInComposedTree(position);
 }
 
-// TODO(yosin) We should move |hasRenderedNonAnonymousDescendantsWithHeight|
-// to "VisibleUnits.cpp" to reduce |LayoutObject| dependency in "Position.cpp"
-bool hasRenderedNonAnonymousDescendantsWithHeight(LayoutObject*);
-
 // TODO(yosin) We should move |inRenderedText()| to "VisibleUnits.h" for
 // reduce dependency of |LayoutObject| in |Position| class.
 CORE_EXPORT bool inRenderedText(const Position&);