Narrow cases where Sparse/Smart versions of Array methods are used

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 0dc5e3a22f5d2b732c8557c81b395ab72dd962e4..ac50ab243989f281c09d259ef4bf2268dd2aeaea 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -3545,6 +3545,10 @@ class Dictionary: public HashTable<Derived, Shape, Key> {
   // Returns the number of enumerable elements in the dictionary.
   int NumberOfEnumElements();
 
+  // Returns true if the dictionary contains any elements that are non-writable,
+  // non-configurable, or have getters/setters.
+  bool HasComplexElements();
+
   enum SortMode { UNSORTED, SORTED };
   // Copies keys to preallocated fixed array.
   void CopyKeysTo(FixedArray* storage,