Use placement new for ZoneLists in the parser.

src/zone.h

 // Copyright 2011 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 160 matching lines @@
 };
 
 
 // ZoneLists are growable lists with constant-time access to the
 // elements. The list itself and all its elements are allocated in the
 // Zone. ZoneLists cannot be deleted individually; you can delete all
 // objects in the Zone by calling Zone::DeleteAll().
 template<typename T>
 class ZoneList: public List<T, ZoneListAllocationPolicy> {
  public:
+  inline void* operator new(size_t size);
+  inline void* operator new(size_t size, Zone* zone);
+
   // Construct a new ZoneList with the given capacity; the length is
   // always zero. The capacity must be non-negative.
   explicit ZoneList(int capacity)
       : List<T, ZoneListAllocationPolicy>(capacity) { }
 
   // Construct a new ZoneList by copying the elements of the given ZoneList.
   explicit ZoneList(const ZoneList<T>& other)
       : List<T, ZoneListAllocationPolicy>(other.length()) {
     AddAll(other);
   }
@@ skipping 38 matching lines @@
  public:
   ZoneSplayTree()
       : SplayTree<Config, ZoneListAllocationPolicy>() {}
   ~ZoneSplayTree();
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ZONE_H_