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

chrome/browser/ui/user_manager.h

Index: chrome/browser/ui/user_manager.h
diff --git a/chrome/browser/ui/user_manager.h b/chrome/browser/ui/user_manager.h
index 4e0d21715c91b7a12447ca4aa797d0dfa4596fb3..e5909974f62672c5bf042cde2b174b88d3748236 100644
--- a/chrome/browser/ui/user_manager.h
+++ b/chrome/browser/ui/user_manager.h
@@ -32,11 +32,21 @@ class UserManager {
   // 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);
+
   // 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;
 
+  static const int kReauthDialogWidth = 360;
+  static const int kReauthDialogHeight = 440;
+
  private:
   DISALLOW_COPY_AND_ASSIGN(UserManager);
 };