Fix usage error for libresolv - res_ninit on OSX requires res_ndestroy to close

net/dns/dns_config_service_posix.cc

 // Copyright (c) 2011 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 "net/dns/dns_config_service_posix.h"
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/file_path.h"
@@ skipping 17 matching lines @@
       success_(false) {}
 
   void DoRead() OVERRIDE {
     struct __res_state res;
     if ((res_ninit(&res) == 0) && (res.options & RES_INIT)) {
       success_ = ConvertResToConfig(res, &dns_config_);
     } else {
       // Note: res_ninit in glibc always returns 0 and sets RES_INIT.
       success_ = false;
     }
+#if defined(OS_MACOSX)
+    res_ndestroy(&res);
+#else
     res_nclose(&res);
+#endif
   }
 
   void OnReadFinished() OVERRIDE {
     if (success_)
       service_->OnConfigRead(dns_config_);
   }
 
  private:
   virtual ~DnsConfigReader() {}
 
@@ skipping 69 matching lines @@
   dns_config->ndots = res.ndots;
   dns_config->timeout = base::TimeDelta::FromSeconds(res.retrans);
   dns_config->attempts = res.retry;
   dns_config->rotate = res.options & RES_ROTATE;
   dns_config->edns0 = res.options & RES_USE_EDNS0;
 
   return true;
 }
 
 }  // namespace net