Settings: Hide fingerprint setup from options.

chrome/browser/resources/options/chromeos/quick_unlock_configure_overlay.js

 // Copyright 2016 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.
 
 cr.define('options', function() {
   var Page = cr.ui.pageManager.Page;
   var PageManager = cr.ui.pageManager.PageManager;
 
   /**
    * QuickUnlockConfigureOverlay class
@@ skipping 47 matching lines @@
     },
 
     /**
      * Called when polymer has been loaded and the dialog should be displayed.
      * @private
      */
     onPolymerLoaded_: function() {
       settings.navigateTo(settings.Route.LOCK_SCREEN);
       var lockScreen = document.querySelector('settings-lock-screen');
 
-      var checkbox =
-          lockScreen.root.querySelector(
-              'div.settings-box.single-column.screen-lock');
+      var checkbox = lockScreen.root.querySelector('div.settings-box');

[stevenjb (google-dont-use), 2017/02/23 17:10:57]

Why this selector change? It seems fragile. It wasn't a great selector before
(and it looks like maybe it didn't work? I don't see it in lock_screen.html).
It's also not a great variable name; I don't see any checkboxes in
lock_screen.html, I assume it's for the toggle? A unique id might be a good idea
here also.
 

[sammiequon, 2017/02/23 22:31:04]

Yeah, I noticed it was not working while working on this CL so I tweaked it to
work. Changed to use unique id.

       checkbox.hidden = true;
 
+      // The fingerprint settings on options is always hidden.
+      var fingerprintDiv = lockScreen.root.querySelector('#fingerprintDiv');
+      fingerprintDiv.hidden = true;
+
       var passwordPrompt = lockScreen.root.
           querySelector('settings-password-prompt-dialog');
       passwordPrompt.addEventListener('close', function() {
         if (!lockScreen.setModes_) {
           QuickUnlockConfigureOverlay.dismiss();
         }
       }.bind(this));
     },
   };
 
   QuickUnlockConfigureOverlay.dismiss = function() {
     PageManager.closeOverlay();
   };
 
   // Export
   return {
     QuickUnlockConfigureOverlay: QuickUnlockConfigureOverlay
   };
 });