Make objects embedded in optimized code weak.

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 53 matching lines @@
 
   Handle<UnseededNumberDictionary> NewUnseededNumberDictionary(
       int at_least_space_for);
 
   Handle<NameDictionary> NewNameDictionary(int at_least_space_for);
 
   Handle<ObjectHashSet> NewObjectHashSet(int at_least_space_for);
 
   Handle<ObjectHashTable> NewObjectHashTable(int at_least_space_for);
 
+  Handle<WeakHashTable> NewWeakHashTable(int at_least_space_for);
+
   Handle<DescriptorArray> NewDescriptorArray(int number_of_descriptors,
                                              int slack = 0);
   Handle<DeoptimizationInputData> NewDeoptimizationInputData(
       int deopt_entry_count,
       PretenureFlag pretenure);
   Handle<DeoptimizationOutputData> NewDeoptimizationOutputData(
       int deopt_entry_count,
       PretenureFlag pretenure);
   // Allocates a pre-tenured empty AccessorPair.
   Handle<AccessorPair> NewAccessorPair();
@@ skipping 174 matching lines @@
   // overflowing the instance size.
   Handle<Map> CopyMap(Handle<Map> map, int extra_inobject_props);
   Handle<Map> CopyMap(Handle<Map> map);
 
   Handle<Map> GetElementsTransitionMap(Handle<JSObject> object,
                                        ElementsKind elements_kind);
 
   Handle<FixedArray> CopyFixedArray(Handle<FixedArray> array);
 
   Handle<FixedArray> CopySizeFixedArray(Handle<FixedArray> array,
-                                        int new_length);
+                                        int new_length,
+                                        PretenureFlag pretenure = NOT_TENURED);
 
   Handle<FixedDoubleArray> CopyFixedDoubleArray(
       Handle<FixedDoubleArray> array);
 
   // Numbers (e.g. literals) are pretenured by the parser.
   Handle<Object> NewNumber(double value,
                            PretenureFlag pretenure = NOT_TENURED);
 
   Handle<Object> NewNumberFromInt(int32_t value,
                                   PretenureFlag pretenure = NOT_TENURED);
@@ skipping 382 matching lines @@
   }
 
  private:
   Isolate* isolate_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_FACTORY_H_