Fix some usage of "this" in builtins

src/codegen.cc

 // Copyright 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 326 matching lines @@
   {&CodeGenerator::GenerateArgumentsAccess, "_Arguments"},
   {&CodeGenerator::GenerateClassOf, "_ClassOf"},
   {&CodeGenerator::GenerateValueOf, "_ValueOf"},
   {&CodeGenerator::GenerateSetValueOf, "_SetValueOf"},
   {&CodeGenerator::GenerateFastCharCodeAt, "_FastCharCodeAt"},
   {&CodeGenerator::GenerateObjectEquals, "_ObjectEquals"},
   {&CodeGenerator::GenerateLog, "_Log"},
   {&CodeGenerator::GenerateRandomPositiveSmi, "_RandomPositiveSmi"},
   {&CodeGenerator::GenerateIsObject, "_IsObject"},
   {&CodeGenerator::GenerateIsFunction, "_IsFunction"},
+  {&CodeGenerator::GenerateIsUndetectableObject, "_IsUndetectableObject"},
   {&CodeGenerator::GenerateStringAdd, "_StringAdd"},
   {&CodeGenerator::GenerateSubString, "_SubString"},
   {&CodeGenerator::GenerateStringCompare, "_StringCompare"},
   {&CodeGenerator::GenerateRegExpExec, "_RegExpExec"},
 };
 
 
 CodeGenerator::InlineRuntimeLUT* CodeGenerator::FindInlineRuntimeLUT(
     Handle<String> name) {
   const int entries_count =
@@ skipping 138 matching lines @@
   }
 }
 
 
 void ApiGetterEntryStub::SetCustomCache(Code* value) {
   info()->set_load_stub_cache(value);
 }
 
 
 } }  // namespace v8::internal