[presubmit] Enable readability/namespace linter checking.

src/log.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_LOG_H_
 #define V8_LOG_H_
 
 #include <string>
 
 #include "src/allocation.h"
@@ skipping 508 matching lines @@
 
   virtual void LogRecordedBuffer(Code* code,
                                  SharedFunctionInfo* shared,
                                  const char* name,
                                  int length) = 0;
 
   NameBuffer* name_buffer_;
 };
 
 
-} }  // namespace v8::internal
+}  // namespace internal
+}  // namespace v8
 
 
 #endif  // V8_LOG_H_