| Index: src/objects.h | 
| diff --git a/src/objects.h b/src/objects.h | 
| index a5277c11f5eb0c3ba88191cb85282cf487f7d15c..7302761f8d8f15775c766eb87f58e7090a160a93 100644 | 
| --- a/src/objects.h | 
| +++ b/src/objects.h | 
| @@ -3187,6 +3187,7 @@ class StringTable: public HashTable<StringTable, | 
| // added. The return value is the string found. | 
| static Handle<String> LookupString(Isolate* isolate, Handle<String> key); | 
| static Handle<String> LookupKey(Isolate* isolate, HashTableKey* key); | 
| +  static String* LookupKeyIfExists(Isolate* isolate, HashTableKey* key); | 
|  | 
| // Tries to internalize given string and returns string handle on success | 
| // or an empty handle otherwise. | 
|  |