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

src/builtins.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 1204 matching lines @@
 //
 
 
 // Searches the hidden prototype chain of the given object for the first
 // object that is an instance of the given type.  If no such object can
 // be found then Heap::null_value() is returned.
 static inline Object* FindHidden(Heap* heap,
                                  Object* object,
                                  FunctionTemplateInfo* type) {
   if (object->IsInstanceOf(type)) return object;
-  Object* proto = object->GetPrototype();
+  Object* proto = object->GetPrototype(heap->isolate());
   if (proto->IsJSObject() &&
       JSObject::cast(proto)->map()->is_hidden_prototype()) {
     return FindHidden(heap, proto, type);
   }
   return heap->null_value();
 }
 
 
 // Returns the holder JSObject if the function can legally be called
 // with this receiver.  Returns Heap::null_value() if the call is
@@ skipping 639 matching lines @@
   return Handle<Code>(code_address);                        \
 }
 BUILTIN_LIST_C(DEFINE_BUILTIN_ACCESSOR_C)
 BUILTIN_LIST_A(DEFINE_BUILTIN_ACCESSOR_A)
 BUILTIN_LIST_DEBUG_A(DEFINE_BUILTIN_ACCESSOR_A)
 #undef DEFINE_BUILTIN_ACCESSOR_C
 #undef DEFINE_BUILTIN_ACCESSOR_A
 
 
 } }  // namespace v8::internal