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

chrome/browser/ui/webui/chromeos/login/screenlock_icon_provider.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_UI_WEBUI_CHROMEOS_LOGIN_SCREENLOCK_ICON_PROVIDER_H_
 #define CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_SCREENLOCK_ICON_PROVIDER_H_
 
 #include <map>
 
 #include "base/memory/weak_ptr.h"
 #include "ui/gfx/image/image.h"
 
 namespace chromeos {
 
 // Stores icon images used by the screenlockPrivate API. This class is
 // separate from ScreenlockIconSource for finer memory management.
 class ScreenlockIconProvider
     : public base::SupportsWeakPtr<ScreenlockIconProvider> {
  public:
   ScreenlockIconProvider();
   ~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);
 
   // Removes all stored icon images.
   void Clear();
 
  private:
   // Map of icons for the user pod buttons set by screenlockPrivate.showButton.
   std::map<std::string, gfx::Image> user_icon_map_;
 
   DISALLOW_COPY_AND_ASSIGN(ScreenlockIconProvider);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_SCREENLOCK_ICON_PROVIDER_H_