Always invoke C++ ArrayPush builtin.

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 417 matching lines @@
     check = StubCompiler::BOOLEAN_CHECK;
   }
 
   Code::Flags flags =
       Code::ComputeMonomorphicFlags(Code::CALL_IC,
                                     CONSTANT_FUNCTION,
                                     in_loop,
                                     argc);
   Object* code = map->FindInCodeCache(name, flags);
   if (code->IsUndefined()) {
-    if (object->IsJSObject()) {
-      Object* opt =
-          Top::LookupSpecialFunction(JSObject::cast(object), holder, function);
-      if (opt->IsJSFunction()) {
-        check = StubCompiler::JSARRAY_HAS_FAST_ELEMENTS_CHECK;
-        function = JSFunction::cast(opt);
-      }
-    }
     // If the function hasn't been compiled yet, we cannot do it now
     // because it may cause GC. To avoid this issue, we return an
     // internal error which will make sure we do not update any
     // caches.
     if (!function->is_compiled()) return Failure::InternalError();
     // Compile the stub - only create stubs for fully compiled functions.
     CallStubCompiler compiler(argc, in_loop);
     code = compiler.CompileCallConstant(object, holder, function, name, check);
     if (code->IsFailure()) return code;
     ASSERT_EQ(flags, Code::cast(code)->flags());
@@ skipping 670 matching lines @@
   if (!result->IsFailure()) {
     Code* code = Code::cast(result);
     USE(code);
     LOG(CodeCreateEvent(Logger::STUB_TAG, code, "ConstructStub"));
   }
   return result;
 }
 
 
 } }  // namespace v8::internal