[presubmit] Enable readability/namespace linter checking.

src/scopeinfo.h

 // Copyright 2011 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_SCOPEINFO_H_
 #define V8_SCOPEINFO_H_
 
 #include "src/allocation.h"
 #include "src/modules.h"
 #include "src/variables.h"
@@ skipping 151 matching lines @@
   void set_name(int i, String* name) { set(name_offset(i), name); }
   void set_mode(int i, VariableMode mode) {
     set(mode_offset(i), Smi::FromInt(mode));
   }
   void set_index(int i, int index) {
     set(index_offset(i), Smi::FromInt(index));
   }
 };
 
 
-} }  // namespace v8::internal
+}  // namespace internal
+}  // namespace v8
 
 #endif  // V8_SCOPEINFO_H_