Avoid TLS accesses in Object::Lookup and Object::GetPrototype.

src/isolate.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 1156 matching lines @@
 
 bool Isolate::IsErrorObject(Handle<Object> obj) {
   if (!obj->IsJSObject()) return false;
 
   String* error_key =
       *(factory()->LookupOneByteSymbol(STATIC_ASCII_VECTOR("$Error")));
   Object* error_constructor =
       js_builtins_object()->GetPropertyNoExceptionThrown(error_key);
 
   for (Object* prototype = *obj; !prototype->IsNull();
-       prototype = prototype->GetPrototype()) {
+       prototype = prototype->GetPrototype(this)) {
     if (!prototype->IsJSObject()) return false;
     if (JSObject::cast(prototype)->map()->constructor() == error_constructor) {
       return true;
     }
   }
   return false;
 }
 
 
 void Isolate::DoThrow(Object* exception, MessageLocation* location) {
@@ skipping 1097 matching lines @@
 
 #ifdef DEBUG
 #define ISOLATE_FIELD_OFFSET(type, name, ignored)                       \
 const intptr_t Isolate::name##_debug_offset_ = OFFSET_OF(Isolate, name##_);
 ISOLATE_INIT_LIST(ISOLATE_FIELD_OFFSET)
 ISOLATE_INIT_ARRAY_LIST(ISOLATE_FIELD_OFFSET)
 #undef ISOLATE_FIELD_OFFSET
 #endif
 
 } }  // namespace v8::internal