Regularize namespace closing curlies

src/runtime/runtime-classes.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 <stdlib.h>
 #include <limits>
 
 #include "src/v8.h"
 
 #include "src/arguments.h"
@@ skipping 442 matching lines @@
 RUNTIME_FUNCTION(Runtime_DefaultConstructorCallSuper) {
   UNIMPLEMENTED();
   return nullptr;
 }
 
 
 RUNTIME_FUNCTION(Runtime_CallSuperWithSpread) {
   UNIMPLEMENTED();
   return nullptr;
 }
-}
-}  // namespace v8::internal
+}  // namespace internal
+}  // namespace v8