[presubmit] Enable readability/namespace linter checking.

src/optimizing-compile-dispatcher.h

 // Copyright 2012 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.
 
 #ifndef V8_OPTIMIZING_COMPILE_DISPATCHER_H_
 #define V8_OPTIMIZING_COMPILE_DISPATCHER_H_
 
 #include <queue>
 
 #include "src/base/atomicops.h"
@@ skipping 113 matching lines @@
   base::Mutex ref_count_mutex_;
   base::ConditionVariable ref_count_zero_;
 
   // Copy of FLAG_concurrent_recompilation_delay that will be used from the
   // background thread.
   //
   // Since flags might get modified while the background thread is running, it
   // is not safe to access them directly.
   int recompilation_delay_;
 };
-}
-}  // namespace v8::internal
+}  // namespace internal
+}  // namespace v8
 
 #endif  // V8_OPTIMIZING_COMPILE_DISPATCHER_H_