Support weak heap references in the ConstantPool to support IsWeakObjectInOptimizedCode objects.

src/factory.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 45 matching lines @@
 
   // Allocate a new uninitialized fixed double array.
   Handle<FixedDoubleArray> NewFixedDoubleArray(
       int size,
       PretenureFlag pretenure = NOT_TENURED);
 
   Handle<ConstantPoolArray> NewConstantPoolArray(
       int number_of_int64_entries,
       int number_of_code_ptr_entries,
       int number_of_heap_ptr_entries,
+      int number_of_weak_ptr_entries,
       int number_of_int32_entries);
 
   Handle<SeededNumberDictionary> NewSeededNumberDictionary(
       int at_least_space_for);
 
   Handle<UnseededNumberDictionary> NewUnseededNumberDictionary(
       int at_least_space_for);
 
   Handle<NameDictionary> NewNameDictionary(int at_least_space_for);
 
@@ skipping 535 matching lines @@
                           isolate());
   } else {
     return NewNumber(static_cast<double>(value), pretenure);
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_FACTORY_H_