1 files changed, 8 insertions, 4 deletions
diff --git a/deps/v8/src/lookup.h b/deps/v8/src/lookup.h
index 90edd8b43d..3888ed6240 100644
--- a/deps/v8/src/lookup.h
+++ b/deps/v8/src/lookup.h
@@ -56,7 +56,7 @@ class LookupIterator final BASE_EMBEDDED {
         // kMaxUInt32 isn't a valid index.
         index_(kMaxUInt32),
         receiver_(receiver),
-        holder_(GetRoot(receiver_, isolate_)),
+        holder_(GetRoot(isolate_, receiver)),
         holder_map_(holder_->map(), isolate_),
         initial_holder_(holder_),
         number_(DescriptorArray::kNotFound) {
@@ -102,7 +102,7 @@ class LookupIterator final BASE_EMBEDDED {
         name_(),
         index_(index),
         receiver_(receiver),
-        holder_(GetRoot(receiver_, isolate_)),
+        holder_(GetRoot(isolate, receiver, index)),
         holder_map_(holder_->map(), isolate_),
         initial_holder_(holder_),
         number_(DescriptorArray::kNotFound) {
@@ -168,7 +168,7 @@ class LookupIterator final BASE_EMBEDDED {
   Handle<Name> GetName() {
     if (name_.is_null()) {
       DCHECK(IsElement());
-      name_ = isolate_->factory()->Uint32ToString(index_);
+      name_ = factory()->Uint32ToString(index_);
     }
     return name_;
   }
@@ -183,6 +183,7 @@ class LookupIterator final BASE_EMBEDDED {
     state_ = NOT_FOUND;
   }
 
+  Heap* heap() const { return isolate_->heap(); }
   Factory* factory() const { return isolate_->factory(); }
   Handle<Object> GetReceiver() const { return receiver_; }
   Handle<JSObject> GetStoreTarget() const;
@@ -196,7 +197,8 @@ class LookupIterator final BASE_EMBEDDED {
     DCHECK(IsFound());
     return Handle<T>::cast(holder_);
   }
-  static Handle<JSReceiver> GetRoot(Handle<Object> receiver, Isolate* isolate);
+  static Handle<JSReceiver> GetRoot(Isolate* isolate, Handle<Object> receiver,
+                                    uint32_t index = kMaxUInt32);
   bool HolderIsReceiverOrHiddenPrototype() const;
 
   /* ACCESS_CHECK */
@@ -220,6 +222,8 @@ class LookupIterator final BASE_EMBEDDED {
   void TransitionToAccessorProperty(AccessorComponent component,
                                     Handle<Object> accessor,
                                     PropertyAttributes attributes);
+  void TransitionToAccessorPair(Handle<Object> pair,
+                                PropertyAttributes attributes);
   PropertyDetails property_details() const {
     DCHECK(has_property_);
     return property_details_;