[key-accumulator] Starting to reimplement the key-accumulator

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 0e50a3b8f604504d3ddbe87e3a214b7238bdd9f1..b9a57e2bde5fd8f2b92ff5a35d17f4adf70b4c41 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -2045,6 +2045,8 @@ class JSObject: public JSReceiver {
   inline bool HasSlowArgumentsElements();
   inline bool HasFastStringWrapperElements();
   inline bool HasSlowStringWrapperElements();
+  bool HasEnumerableElements();
+
   inline SeededNumberDictionary* element_dictionary();  // Gets slow elements.
 
   // Requires: HasFastElements().
@@ -2298,6 +2300,9 @@ class JSObject: public JSReceiver {
 
   static Handle<FixedArray> GetEnumPropertyKeys(Handle<JSObject> object);
 
+  static Handle<FixedArray> GetFastEnumPropertyKeys(Isolate* isolate,
+                                                    Handle<JSObject> object);
+
   // Returns a new map with all transitions dropped from the object's current
   // map and the ElementsKind set.
   static Handle<Map> GetElementsTransitionMap(Handle<JSObject> object,
@@ -2894,6 +2899,8 @@ class ArrayList : public FixedArray {
   };
   static Handle<ArrayList> Add(Handle<ArrayList> array, Handle<Object> obj,
                                AddMode mode = kNone);
+  static Handle<ArrayList> Add(Handle<ArrayList> array, Smi* smi,
+                               AddMode mode = kNone);
   static Handle<ArrayList> Add(Handle<ArrayList> array, Handle<Object> obj1,
                                Handle<Object> obj2, AddMode = kNone);
   inline int Length();