Optimize @@species based on a global 'protector' cell

src/lookup.h

Index: src/lookup.h
diff --git a/src/lookup.h b/src/lookup.h
index b800a57bcb2dd97d449827a7845094bdc08c9be0..0c298d99bf7ed2a0de1015a1f383a1fb5292c34c 100644
--- a/src/lookup.h
+++ b/src/lookup.h
@@ -256,6 +256,7 @@ class LookupIterator final BASE_EMBEDDED {
   }
   Handle<Object> GetDataValue() const;
   void WriteDataValue(Handle<Object> value);
+  void UpdateProtector();
 
  private:
   enum class InterceptorState {
@@ -320,6 +321,8 @@ class LookupIterator final BASE_EMBEDDED {
 
   State NotFound(JSReceiver* const holder) const;
 
+  bool HolderIsInContextIndex(uint32_t index) const;
+
   // If configuration_ becomes mutable, update
   // HolderIsReceiverOrHiddenPrototype.
   const Configuration configuration_;