Implemented system tray UI for new account management.

ash/system/tray/default_system_tray_delegate.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 ASH_SYSTEM_TRAY_DEFAULT_SYSTEM_TRAY_DELEGATE_H_
 #define ASH_SYSTEM_TRAY_DEFAULT_SYSTEM_TRAY_DELEGATE_H_
 
 #include "ash/ash_export.h"
 #include "ash/system/tray/system_tray_delegate.h"
 #include "base/compiler_specific.h"
@@ skipping 75 matching lines @@
       scoped_ptr<VolumeControlDelegate> delegate) OVERRIDE;
   virtual bool GetSessionStartTime(
       base::TimeTicks* session_start_time) OVERRIDE;
   virtual bool GetSessionLengthLimit(
       base::TimeDelta* session_length_limit) OVERRIDE;
   virtual int GetSystemTrayMenuWidth() OVERRIDE;
   virtual void ActiveUserWasChanged() OVERRIDE;
   virtual bool IsNetworkBehindCaptivePortal(
       const std::string& service_path) const OVERRIDE;
   virtual bool IsSearchKeyMappedToCapsLock() OVERRIDE;
+  virtual tray::UserAccountsDelegate* GetUserAccountsDelegate(
+      const std::string& user_id) OVERRIDE;
 
  private:
   bool bluetooth_enabled_;
   scoped_ptr<VolumeControlDelegate> volume_control_delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(DefaultSystemTrayDelegate);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_TRAY_DEFAULT_SYSTEM_TRAY_DELEGATE_H_