Track sources of proxy settings.

net/proxy/proxy_config_service_mac.cc

 // 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.
 
 #include "net/proxy/proxy_config_service_mac.h"
 
 #include <CoreFoundation/CoreFoundation.h>
 #include <SystemConfiguration/SystemConfiguration.h>
 
 #include "base/bind.h"
@@ skipping 136 matching lines @@
     }
   }
 
   // proxy bypass boolean
 
   if (GetBoolFromDictionary(config_dict.get(),
                             kSCPropNetProxiesExcludeSimpleHostnames,
                             false)) {
     config->proxy_rules().bypass_rules.AddRuleToBypassLocal();
   }
+
+  // Source
+  config->set_source(PROXY_CONFIG_SOURCE_SYSTEM);
 }
 
 }  // namespace
 
 // Reference-counted helper for posting a task to
 // ProxyConfigServiceMac::OnProxyConfigChanged between the notifier and IO
 // thread. This helper object may outlive the ProxyConfigServiceMac.
 class ProxyConfigServiceMac::Helper
     : public base::RefCountedThreadSafe<ProxyConfigServiceMac::Helper> {
  public:
@@ skipping 95 matching lines @@
   // Keep track of the last value we have seen.
   has_fetched_config_ = true;
   last_config_fetched_ = new_config;
 
   // Notify all the observers.
   FOR_EACH_OBSERVER(Observer, observers_,
                     OnProxyConfigChanged(new_config, CONFIG_VALID));
 }
 
 }  // namespace net