Perform online reauth when password is changed for a locked profile.

chrome/browser/ui/user_manager.h

 // Copyright (c) 2014 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_USER_MANAGER_H_
 #define CHROME_BROWSER_UI_USER_MANAGER_H_
 
 #include "chrome/browser/profiles/profile_window.h"
 
 namespace base {
@@ skipping 14 matching lines @@
 
   // Hides the User Manager.
   static void Hide();
 
   // Returns whether the User Manager is showing.
   static bool IsShowing();
 
   // To be called once the User Manager's contents are showing.
   static void OnUserManagerShown();
 
+  // Shows a dialog where the user can re-authenticate when their profile is
+  // not yet open.  This is called from the user manager when a profile is
+  // locked and it has detected that the user's password has changed since the
+  // profile was locked.
+  static void ShowReauthDialog(content::BrowserContext* browser_context,
+                               const std::string& email,
+                               size_t profile_index);

[sky, 2015/07/23 16:56:04]

Is it common to pass around an index like this as identity? Might the index
shift around while the dialog is up? Say a profile is removed?

[Alexei Svitkine (slow), 2015/07/23 21:49:33]

I share this concern. I think it can be a problem if we keep it as a member of a
class like a dialog. Either it would need to listen to notifications on changes
- or use the profile name string for the identifier instead.

[Roger Tawa OOO till Jul 10th, 2015/07/24 16:15:12]

I redid this code to no longer need an index.

+
   // TODO(noms): Figure out if this size can be computed dynamically or adjusted
   // for smaller screens.
   static const int kWindowWidth = 800;
   static const int kWindowHeight = 600;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(UserManager);
 };
 
 #endif  // CHROME_BROWSER_UI_USER_MANAGER_H_