net doesn't depend on libevent directly now.

net/net.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 776 matching lines @@
               'udp/udp_socket_libevent.cc',
               'udp/udp_socket_libevent.h',
             ],
             'dependencies': [
               '../third_party/nss/nss.gyp:nss',
               'third_party/nss/ssl.gyp:ssl',
               'tld_cleanup',
             ],
           },
           {  # else: OS != "win"
-            'dependencies': [
-              '../third_party/libevent/libevent.gyp:libevent',
-            ],
             'sources!': [
               'base/winsock_init.cc',
               'base/winsock_init.h',
               'base/winsock_util.cc',
               'base/winsock_util.h',
               'proxy/proxy_resolver_winhttp.cc',
               'proxy/proxy_resolver_winhttp.h',
             ],
           },
         ],
@@ skipping 635 matching lines @@
       ],
     }],
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: