Fix closing namespace comments in //net.

net/tools/dns_fuzz_stub/dns_fuzz_stub.cc

 // Copyright (c) 2012 The Chromium 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 <stdint.h>
 
 #include <algorithm>
 #include <limits>
 #include <memory>
 #include <sstream>
@@ skipping 185 matching lines @@
   if (!net::DNSDomainFromDot(qname, &qname_dns)) {
     LOG(ERROR) << filename << ": DNSDomainFromDot(" << qname << ") failed.";
     return false;
   }
 
   RunTestCase(id, qname_dns, qtype, resp_buf);
 
   return true;
 }
 
-}
+}  // anonymous namespace
 
 int main(int argc, char** argv) {
   int ret = 0;
 
   for (int i = 1; i < argc; i++)
     if (!ReadAndRunTestCase(argv[i]))
       ret = 2;
 
   // Cluster-Fuzz likes "#EOF" as the last line of output to help distinguish
   // successful runs from crashes.
   printf("#EOF\n");
 
   return ret;
 }