Reverted 3130-3131 since they don't work on mac.

src/stub-cache.cc

 // Copyright 2006-2009 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 717 matching lines @@
 
 
 // Support function for computing call IC miss stubs.
 Handle<Code> ComputeCallMiss(int argc) {
   CALL_HEAP_FUNCTION(StubCache::ComputeCallMiss(argc), Code);
 }
 
 
 
 Object* LoadCallbackProperty(Arguments args) {
-  ASSERT(args[0]->IsJSObject());
-  ASSERT(args[1]->IsJSObject());
   AccessorInfo* callback = AccessorInfo::cast(args[2]);
   Address getter_address = v8::ToCData<Address>(callback->getter());
   v8::AccessorGetter fun = FUNCTION_CAST<v8::AccessorGetter>(getter_address);
   ASSERT(fun != NULL);
-  CustomArguments custom_args(callback->data(),
-                              JSObject::cast(args[0]),
-                              JSObject::cast(args[1]));
-  v8::AccessorInfo info(custom_args.end());
+  v8::AccessorInfo info(args.arguments());
   HandleScope scope;
   v8::Handle<v8::Value> result;
   {
     // Leaving JavaScript.
     VMState state(EXTERNAL);
     result = fun(v8::Utils::ToLocal(args.at<String>(4)), info);
   }
   RETURN_IF_SCHEDULED_EXCEPTION();
   if (result.IsEmpty()) return Heap::undefined_value();
   return *v8::Utils::OpenHandle(*result);
@@ skipping 335 matching lines @@
   if (!result->IsFailure()) {
     Code* code = Code::cast(result);
     USE(code);
     LOG(CodeCreateEvent(Logger::STUB_TAG, code, "ConstructStub"));
   }
   return result;
 }
 
 
 } }  // namespace v8::internal