Cleanup the UseSharedProxies preference.

chrome/browser/chromeos/ui_proxy_config_service.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_UI_PROXY_CONFIG_SERVICE_H_
 #define CHROME_BROWSER_CHROMEOS_UI_PROXY_CONFIG_SERVICE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 10 matching lines @@
 // GetProxyConfig and SetProxyConfig.
 //
 // Before reading/setting a proxy config, a network has to be selected using
 // either SetCurrentNetwork (any remembered network) or
 // MakeActiveNetworkCurrent.
 class UIProxyConfigService {
  public:
   UIProxyConfigService();
   ~UIProxyConfigService();
 
-  void SetPrefs(PrefService* prefs);
+  // |signin_screen| indicates whether this object is used for the
+  // signin screen, in which case proxies of (shared) networks are
+  // unconditionally respected. After signin, proxy settings of shared networks
+  // may be ignored, e.g. depending on the kUseSharedProxies flag. After this
+  // call, proxy settings are read from
+  // |prefs|.
+  void SetPrefs(bool signin_screen, PrefService* prefs);
 
   // Called by UI to set the network with service path |current_network| to be
   // displayed or edited.  Subsequent Set*/Get* methods will use this
   // network, until this method is called again.
   void SetCurrentNetwork(const std::string& current_network);
 
   // Called from UI to retrieve the stored proxy configuration, which is either
   // the last proxy config of the current network or the one last set by
   // SetProxyConfig.
   void GetProxyConfig(UIProxyConfig* config) const;
 
   // Called from UI to update proxy configuration for different modes. Stores
   // and persists |config| to shill for the current network.
   void SetProxyConfig(const UIProxyConfig& config);
 
  private:
   // Determines effective proxy config based on prefs from config tracker,
   // |network| and if user is using shared proxies.  The effective config is
   // stored in |current_ui_config_| but not activated on network stack, and
   // hence, not picked up by observers.
   void DetermineEffectiveConfig(const NetworkState& network);
 
   // Service path of network whose proxy configuration is being displayed or
   // edited via UI.
   std::string current_ui_network_;
 
   // Proxy configuration of |current_ui_network_|.
   UIProxyConfig current_ui_config_;
 
+  bool signin_screen_;
   PrefService* pref_service_;
 
   DISALLOW_COPY_AND_ASSIGN(UIProxyConfigService);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_UI_PROXY_CONFIG_SERVICE_H_