Introduce composed tree version of isEndOfEditableOrNonEditableContent()

Source/core/editing/VisibleUnits.h

Index: Source/core/editing/VisibleUnits.h
diff --git a/Source/core/editing/VisibleUnits.h b/Source/core/editing/VisibleUnits.h
index c98b9ec303d280f93eccb4db3b9bcf198020a9e2..0b235e01fc5600b5edabe3552d472e373f3f79d5 100644
--- a/Source/core/editing/VisibleUnits.h
+++ b/Source/core/editing/VisibleUnits.h
@@ -163,7 +163,8 @@ bool isEndOfDocument(const VisiblePosition&);
 // editable content
 VisiblePosition startOfEditableContent(const VisiblePosition&);
 VisiblePosition endOfEditableContent(const VisiblePosition&);
-bool isEndOfEditableOrNonEditableContent(const VisiblePosition&);
+CORE_EXPORT bool isEndOfEditableOrNonEditableContent(const VisiblePosition&);
+CORE_EXPORT bool isEndOfEditableOrNonEditableContent(const VisiblePositionInComposedTree&);
 
 CORE_EXPORT InlineBoxPosition computeInlineBoxPosition(const Position&, TextAffinity);
 CORE_EXPORT InlineBoxPosition computeInlineBoxPosition(const Position&, TextAffinity, TextDirection primaryDirection);