Remove unused code and exclude unused files on Chrome OS too.

net/net.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.
 
 {
   'variables': {
     'chromium_code': 1,
 
     'linux_link_kerberos%': 0,
     'conditions': [
@@ skipping 777 matching lines @@
              'base/ssl_false_start_blacklist.txt',
               '<(SHARED_INTERMEDIATE_DIR)/net/base/ssl_false_start_blacklist_data.cc',
             ],
           'message': 'Generating SSL False Start blacklist',
           'process_outputs_as_sources': 1,
         },
       ],
       'conditions': [
         ['chromeos==1', {
           'sources!': [
+             'base/network_change_notifier_linux.cc',
+             'base/network_change_notifier_linux.h',
+             'base/network_change_notifier_netlink_linux.cc',
+             'base/network_change_notifier_netlink_linux.h',
              'proxy/proxy_config_service_linux.cc',
              'proxy/proxy_config_service_linux.h',
           ],
         }],
         ['use_kerberos==1', {
           'defines': [
             'USE_KERBEROS',
           ],
           'conditions': [
             ['OS=="openbsd"', {
@@ skipping 455 matching lines @@
         'url_request/view_cache_helper_unittest.cc',
         'websockets/websocket_handshake_handler_unittest.cc',
         'websockets/websocket_job_spdy2_unittest.cc',
         'websockets/websocket_job_spdy3_unittest.cc',
         'websockets/websocket_net_log_params_unittest.cc',
         'websockets/websocket_throttle_unittest.cc',
       ],
       'conditions': [
         ['chromeos==1', {
           'sources!': [
+             'base/network_change_notifier_linux_unittest.cc',
              'proxy/proxy_config_service_linux_unittest.cc',
           ],
         }],
         [ 'use_glib == 1', {
             'dependencies': [
               '../build/linux/system.gyp:ssl',
             ],
           }, {  # else: OS is not in the above list
             'sources!': [
               'base/cert_database_nss_unittest.cc',
@@ skipping 599 matching lines @@
             'tools/dump_cache/url_to_filename_encoder.cc',
             'tools/dump_cache/url_to_filename_encoder.h',
             'tools/dump_cache/url_utilities.h',
             'tools/dump_cache/url_utilities.cc',
           ],
         },
       ],
     }],
   ],
 }