Componentize proxy code from chrome/browser/net

chrome/chrome_browser.gypi

 # Copyright 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': {
     # All .cc, .h, .m, and .mm files under browser except for:
     # * tests and mocks.
     # * code below browser/chromeos
     # * code below browser/extensions
@@ skipping 1911 matching lines @@
       'browser/net/net_log_temp_file.cc',
       'browser/net/net_log_temp_file.h',
       'browser/net/net_pref_observer.cc',
       'browser/net/net_pref_observer.h',
       'browser/net/preconnect.cc',
       'browser/net/preconnect.h',
       'browser/net/prediction_options.cc',
       'browser/net/prediction_options.h',
       'browser/net/predictor.cc',
       'browser/net/predictor.h',
-      'browser/net/pref_proxy_config_tracker.cc',
-      'browser/net/pref_proxy_config_tracker.h',
-      'browser/net/pref_proxy_config_tracker_impl.cc',
-      'browser/net/pref_proxy_config_tracker_impl.h',
       'browser/net/probe_message.cc',
       'browser/net/probe_message.h',
       'browser/net/proxy_service_factory.cc',
       'browser/net/proxy_service_factory.h',
       'browser/net/quota_policy_channel_id_store.cc',
       'browser/net/quota_policy_channel_id_store.h',
       'browser/net/referrer.cc',
       'browser/net/referrer.h',
       'browser/net/request_source_bandwidth_histograms.cc',
       'browser/net/request_source_bandwidth_histograms.h',
@@ skipping 2135 matching lines @@
             '../components/components.gyp:omnibox_browser',
             '../components/components.gyp:rlz',
             '../components/components.gyp:search_engines',
             '../rlz/rlz.gyp:rlz_lib',
           ],
         },
       ],
     }],
   ],
 }