Disable NSS build targets in a Dartium build.

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 165464 (this should agree with "nss_rev" in DEPS).
@@ skipping 16 matching lines @@
       'SQLITE_ENABLE_FTS2',
       'SQLITE_ENABLE_FTS3',
       # Disabled by Dart: An external module with advanced unicode functions.
       # 'SQLITE_ENABLE_ICU',
       'SQLITE_ENABLE_MEMORY_MANAGEMENT',
       'SQLITE_SECURE_DELETE',
       'THREADSAFE',
       '_HAS_EXCEPTIONS=0',
     ],
   },
+  # Added by Dart.  We do not indent, so diffs with the original are clearer.
+  'conditions': [[ 'in_dartium==0', {
   'targets': [
     {
       'target_name': 'sqlite_dart',
       'conditions': [
         [ 'chromeos==1' , {
             'defines': [
                 # Despite obvious warnings about not using this flag
                 # in deployment, we are turning off sync in ChromeOS
                 # and relying on the underlying journaling filesystem
                 # to do error recovery properly.  It's much faster.
@@ skipping 146 matching lines @@
             '<(sqlite_directory)/src/src/shell.c',
             '<(sqlite_directory)/src/src/shell_icu_linux.c',
           ],
           'link_settings': {
             'link_languages': ['c++'],
           },
         },
       ],
     },]
   ],
+  }]],
 }