Fix r17253.

src/api.cc

 // 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 6364 matching lines @@
   }
   return v8::Undefined(reinterpret_cast<v8::Isolate*>(isolate));
 }
 
 
 void Isolate::SetObjectGroupId(internal::Object** object, UniqueId id) {
   i::Isolate* internal_isolate = reinterpret_cast<i::Isolate*>(this);
   internal_isolate->global_handles()->SetObjectGroupId(
       v8::internal::Handle<v8::internal::Object>(object).location(),
       id);
-  internal_isolate->global_handles()->SetObjectGroupId(object, id);
 }
 
 
 void Isolate::SetReferenceFromGroup(UniqueId id, internal::Object** object) {
   i::Isolate* internal_isolate = reinterpret_cast<i::Isolate*>(this);
   internal_isolate->global_handles()->SetReferenceFromGroup(
       id,
       v8::internal::Handle<v8::internal::Object>(object).location());
-  internal_isolate->global_handles()->SetReferenceFromGroup(id, object);
 }
 
 
 void Isolate::SetReference(internal::Object** parent,
                            internal::Object** child) {
   i::Isolate* internal_isolate = reinterpret_cast<i::Isolate*>(this);
   i::Object** parent_location =
       v8::internal::Handle<v8::internal::Object>(parent).location();
   internal_isolate->global_handles()->SetReference(
       reinterpret_cast<i::HeapObject**>(parent_location),
@@ skipping 1167 matching lines @@
   Isolate* isolate = reinterpret_cast<Isolate*>(info.GetIsolate());
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 } }  // namespace v8::internal