Cleanup the UseSharedProxies preference.

chrome/browser/chromeos/ui_proxy_config_service.h

Index: chrome/browser/chromeos/ui_proxy_config_service.h
diff --git a/chrome/browser/chromeos/ui_proxy_config_service.h b/chrome/browser/chromeos/ui_proxy_config_service.h
index 05d867e572faf5c54ec0f358620cd22bd90cd17c..a3662d3175e430252cd553f59a04d78b0f4bcfc4 100644
--- a/chrome/browser/chromeos/ui_proxy_config_service.h
+++ b/chrome/browser/chromeos/ui_proxy_config_service.h
@@ -28,7 +28,9 @@ class UIProxyConfigService {
   UIProxyConfigService();
   ~UIProxyConfigService();
 
-  void SetPrefs(PrefService* prefs);
+  // |signin_screen| indicates whether this object is used for the
+  // signin screen. After this call, proxy settings are read from |prefs|.
+  void SetPrefs(bool signin_screen, PrefService* prefs);

[Nikita (slow), 2013/07/15 08:08:46]

nit: It would be helpful to describe how specifically |signin_screen|  parameter
changes behavior.

[pneubeck (no reviews), 2013/07/16 08:38:06]

Done.

 
   // Called by UI to set the network with service path |current_network| to be
   // displayed or edited.  Subsequent Set*/Get* methods will use this
@@ -58,6 +60,7 @@ class UIProxyConfigService {
   // Proxy configuration of |current_ui_network_|.
   UIProxyConfig current_ui_config_;
 
+  bool signin_screen_;
   PrefService* pref_service_;
 
   DISALLOW_COPY_AND_ASSIGN(UIProxyConfigService);