Add secure sockets to dart:io

runtime/bin/utils.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef BIN_UTILS_H_
 #define BIN_UTILS_H_
 
 #include <stdlib.h>
 #include <string.h>
 
 #include "include/dart_api.h"
 #include "platform/globals.h"
 
 class OSError {
  public:
   enum SubSystem {
     kSystem,
     kGetAddressInfo,
+    kNSS,
     kUnknown = -1
   };
 
   OSError();
   OSError(int code, const char* message, SubSystem sub_system) {
     sub_system_ = sub_system;
     code_ = code;
     message_ = NULL;  // SetMessage will free existing message.
     SetMessage(message);
   }
@@ skipping 17 matching lines @@
   }
 
   SubSystem sub_system_;
   int code_;
   char* message_;
 
   DISALLOW_COPY_AND_ASSIGN(OSError);
 };
 
 #endif  // BIN_UTILS_H_