Include wifi_component only when in Win or Mac platforms.

components/wifi.gypi

 # Copyright 2013 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.
 
 {
   'targets': [
     {
       'target_name': 'wifi_component',
       'type': '<(component)',
       'dependencies': [
         '../base/base.gyp:base',
-        '../components/components.gyp:onc_component',
         '../third_party/libxml/libxml.gyp:libxml',
+        'onc_component',
       ],
       'include_dirs': [
         '..',
       ],
       'defines': [
         'WIFI_IMPLEMENTATION',
       ],
       'sources': [
         'wifi/wifi_export.h',
         'wifi/wifi_service.cc',
@@ skipping 17 matching lines @@
               '$(SDKROOT)/System/Library/Frameworks/SystemConfiguration.framework',
             ]
           },
         }],
       ],
     },
     {
       'target_name': 'wifi_test',
       'type': 'executable',
       'dependencies': [
+        '../base/base.gyp:base',
+        'onc_component',
         'wifi_component',
-        '../base/base.gyp:base',
-        '../components/components.gyp:onc_component',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         'wifi/wifi_test.cc',
       ],
     },
   ],
 }