Password in user pods clears after minute of idle state.

chrome/browser/chromeos/login/webui_login_display.h

 // Copyright (c) 2012 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_LOGIN_WEBUI_LOGIN_DISPLAY_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_WEBUI_LOGIN_DISPLAY_H_
 
 #include <string>
 #include <vector>
 
+#include "ash/wm/user_activity_observer.h"
 #include "base/compiler_specific.h"
+#include "base/timer.h"
 #include "chrome/browser/chromeos/login/login_display.h"
 #include "chrome/browser/chromeos/login/user.h"
 #include "chrome/browser/ui/webui/chromeos/login/native_window_delegate.h"
 #include "chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h"
 #include "ui/views/widget/widget.h"
 
 namespace chromeos {
 // WebUI-based login UI implementation.
 class WebUILoginDisplay : public LoginDisplay,
                           public NativeWindowDelegate,
-                          public SigninScreenHandlerDelegate {
+                          public SigninScreenHandlerDelegate,
+                          public ash::UserActivityObserver {
  public:
   explicit WebUILoginDisplay(LoginDisplay::Delegate* delegate);
   virtual ~WebUILoginDisplay();
 
   // LoginDisplay implementation:
   virtual void Init(const UserList& users,
                     bool show_guest,
                     bool show_users,
                     bool show_new_user) OVERRIDE;
   virtual void OnPreferencesChanged() OVERRIDE;
@@ skipping 38 matching lines @@
       LoginDisplayWebUIHandler* webui_handler) OVERRIDE;
   virtual void ShowSigninScreenForCreds(const std::string& username,
                                         const std::string& password);
   virtual const UserList& GetUsers() const OVERRIDE;
   virtual bool IsShowGuest() const OVERRIDE;
   virtual bool IsShowUsers() const OVERRIDE;
   virtual bool IsShowNewUser() const OVERRIDE;
   virtual void SetDisplayEmail(const std::string& email) OVERRIDE;
   virtual void Signout() OVERRIDE;
 
+  // UserActivityDetector implementation:
+  virtual void OnUserActivity() OVERRIDE;
+
  private:
+  void StartPasswordClearTimer();
+  void OnPasswordClearTimerExpired();
+
   // Set of Users that are visible.
   UserList users_;
 
   // Whether to show guest login.
   bool show_guest_;
 
   // Weather to show the user pads or a plain credentials dialogue.
   bool show_users_;
 
   // Whether to show add new user.
   bool show_new_user_;
 
+  // Timer for measuring idle state duration before password clear.
+  base::OneShotTimer<WebUILoginDisplay> password_clear_timer_;
+
   // Reference to the WebUI handling layer for the login screen
   LoginDisplayWebUIHandler* webui_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(WebUILoginDisplay);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_WEBUI_LOGIN_DISPLAY_H_