Support placement new syntax for zone objects and start using it in the parser.

src/zone-inl.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 79 matching lines @@
 }
 
 
 // TODO(isolates): for performance reasons, this should be replaced with a new
 //                 operator that takes the zone in which the object should be
 //                 allocated.
 void* ZoneObject::operator new(size_t size) {
   return ZONE->New(static_cast<int>(size));
 }
 
+void* ZoneObject::operator new(size_t size, Zone* zone) {
+  return zone->New(static_cast<int>(size));
+}
+
 
 inline void* ZoneListAllocationPolicy::New(int size) {
   return ZONE->New(size);
 }
 
 
 ZoneScope::ZoneScope(ZoneScopeMode mode)
     : isolate_(Isolate::Current()),
       mode_(mode) {
   isolate_->zone()->scope_nesting_++;
 }
 
 
 bool ZoneScope::ShouldDeleteOnExit() {
   return isolate_->zone()->scope_nesting_ == 1 && mode_ == DELETE_ON_EXIT;
 }
 
 
 int ZoneScope::nesting() {
   return Isolate::Current()->zone()->scope_nesting_;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ZONE_INL_H_