Remove JSBuiltinsObject.

src/runtime/runtime-scopes.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/runtime/runtime-utils.h"
 
 #include "src/accessors.h"
 #include "src/arguments.h"
 #include "src/frames-inl.h"
 #include "src/isolate-inl.h"
@@ skipping 655 matching lines @@
   Handle<ScriptContextTable> script_context_table(
       native_context->script_context_table());
 
   Object* name_clash_result =
       FindNameClash(scope_info, global_object, script_context_table);
   if (isolate->has_pending_exception()) return name_clash_result;
 
   // Script contexts have a canonical empty function as their closure, not the
   // anonymous closure containing the global code.  See
   // FullCodeGenerator::PushFunctionArgumentForContextAllocation.
-  Handle<JSFunction> closure(global_object->IsJSBuiltinsObject()
-                                 ? *function
-                                 : native_context->closure());
+  Handle<JSFunction> closure(function->IsBuiltin() ? *function
+                                                   : native_context->closure());
   Handle<Context> result =
       isolate->factory()->NewScriptContext(closure, scope_info);
 
   result->InitializeGlobalSlots();
 
   DCHECK(function->context() == isolate->context());
   DCHECK(*global_object == result->global_object());
 
   Handle<ScriptContextTable> new_script_context_table =
       ScriptContextTable::Extend(script_context_table, result);
@@ skipping 478 matching lines @@
 
   // Lookup in the initial Object.prototype object.
   Handle<Object> result;
   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
       isolate, result,
       Object::GetProperty(isolate->initial_object_prototype(), key));
   return *result;
 }
 }  // namespace internal
 }  // namespace v8