Update NSS to NSS 3.16 RTM

dart/runtime/bin/net/sqlite.gyp

 # 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.
 
 # 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.
 
 # This file is a modified copy of Chromium's src/third_party/sqlite/sqlite.gyp.
-# Revision 232552 (this should agree with "nss_rev" in DEPS).
+# Revision 257452 (this should agree with "nss_rev" in DEPS).
 {
   # Added by Dart. All Dart comments refer to the following block or line.
   'includes': [
     '../../tools/gyp/runtime-configurations.gypi',
     '../../tools/gyp/nss_configurations.gypi',
   ],
   'variables': {
     # Added by Dart.
     'sqlite_directory': '../../../third_party/sqlite',
     'use_system_sqlite%': 0,
@@ skipping 202 matching lines @@
           ],
           'sources': [
             'src/ext/icu/icu.c',
           ],
         },
       ],
     }],
   ],
   }]],
 }