Serializer: commit new internalized strings after deserialization.

src/objects.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/allocation.h"
@@ skipping 3169 matching lines @@
 // No special elements in the prefix and the element size is 1
 // because only the string itself (the key) needs to be stored.
 class StringTable: public HashTable<StringTable,
                                     StringTableShape,
                                     HashTableKey*> {
  public:
   // Find string in the string table. If it is not there yet, it is
   // 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.
   MUST_USE_RESULT static MaybeHandle<String> InternalizeStringIfExists(
       Isolate* isolate,
       Handle<String> string);
 
   // Looks up a string that is equal to the given string and returns
   // string handle if it is found, or an empty handle otherwise.
   MUST_USE_RESULT static MaybeHandle<String> LookupStringIfExists(
@@ skipping 7606 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_