Refactor user pods to use authType property for distinct authentication modes.

chrome/browser/ui/webui/chromeos/login/screenlock_icon_provider.h

Index: chrome/browser/ui/webui/chromeos/login/screenlock_icon_provider.h
diff --git a/chrome/browser/ui/webui/chromeos/login/screenlock_icon_provider.h b/chrome/browser/ui/webui/chromeos/login/screenlock_icon_provider.h
index c69713c26e4c9150bf0eae818a46a4a8885b5add..714f59ac97246ce021c831ac9ed98234f9f6c37c 100644
--- a/chrome/browser/ui/webui/chromeos/login/screenlock_icon_provider.h
+++ b/chrome/browser/ui/webui/chromeos/login/screenlock_icon_provider.h
@@ -23,6 +23,9 @@ class ScreenlockIconProvider
   // Adds an icon image for |username| to be stored.
   void AddIcon(const std::string& username, const gfx::Image& icon);
 
+  // Removes icon image for |username|.
+  void RemoveIcon(const std::string& username);
+
   // Returns the icon image set for |username|. If no icon is found, then
   // this function returns an empty image.
   gfx::Image GetIcon(const std::string& username);