[presubmit] Enable readability/namespace linter checking.

src/property.h

 // 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.
 
 #ifndef V8_PROPERTY_H_
 #define V8_PROPERTY_H_
 
 #include <iosfwd>
 
 #include "src/factory.h"
@@ skipping 89 matching lines @@
 
 class AccessorConstantDescriptor final : public Descriptor {
  public:
   AccessorConstantDescriptor(Handle<Name> key, Handle<Object> foreign,
                              PropertyAttributes attributes)
       : Descriptor(key, foreign, attributes, ACCESSOR_CONSTANT,
                    Representation::Tagged()) {}
 };
 
 
-} }  // namespace v8::internal
+}  // namespace internal
+}  // namespace v8
 
 #endif  // V8_PROPERTY_H_