Unknown options in extension manifest file are silently ignored

chrome/browser/resources/extensions/extension_list.js

 // 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.
 
 cr.define('options', function() {
   'use strict';
 
   /**
    * A lookup helper function to find the first node that has an id (starting
    * at |node| and going up the parent chain).
@@ skipping 168 matching lines @@
       var trashTemplate = $('template-collection').querySelector('.trash');
       var trash = trashTemplate.cloneNode(true);
       trash.title = loadTimeData.getString('extensionUninstall');
       trash.addEventListener('click', function(e) {
         chrome.send('extensionSettingsUninstall', [extension.id]);
       });
       node.querySelector('.enable-controls').appendChild(trash);
 
       // Developer mode ////////////////////////////////////////////////////////
 
-      // First we have the id.
+      // First, display the id.
       var idLabel = node.querySelector('.extension-id');
       idLabel.textContent = ' ' + extension.id;
 
-      // Then the path, if provided by unpacked extension.
+      // Then, display the path, if provided by unpacked extension.
       if (extension.isUnpacked) {
         var loadPath = node.querySelector('.load-path');
         loadPath.hidden = false;
         loadPath.querySelector('span:nth-of-type(2)').textContent =
             ' ' + extension.path;
       }
 
-      // Then the 'managed, cannot uninstall/disable' message.
+      // Then, display the 'managed, cannot uninstall/disable' message.
       if (!extension.mayDisable)
         node.querySelector('.managed-message').hidden = false;
 
-      // Then active views.
+      // Then, display active views.
       if (extension.views.length > 0) {
         var activeViews = node.querySelector('.active-views');
         activeViews.hidden = false;
         var link = activeViews.querySelector('a');
 
         extension.views.forEach(function(view, i) {
           var label = view.path +
               (view.incognito ?
                   ' ' + loadTimeData.getString('viewIncognito') : '') +
               (view.renderProcessId == -1 ?
                   ' ' + loadTimeData.getString('viewInactive') : '');
           link.textContent = label;
           link.addEventListener('click', function(e) {
             // TODO(estade): remove conversion to string?
             chrome.send('extensionSettingsInspect', [
               String(extension.id),
               String(view.renderProcessId),
               String(view.renderViewId),
               view.incognito
             ]);
           });
 
           if (i < extension.views.length - 1) {
             link = link.cloneNode(true);
             activeViews.appendChild(link);
           }
         });
       }
 
-      // The install warnings.
+      // Then, display install warnings.
       if (extension.installWarnings) {
         var panel = node.querySelector('.install-warnings');
         panel.hidden = false;
         var list = panel.querySelector('ul');
         extension.installWarnings.forEach(function(warning) {
           list.appendChild(document.createElement('li')).innerText = warning;
         });
       }
 
+      // Finally, display the unrecognized manifest keys.
+      if (extension.unrecognizedKeys) {
+        var unrecognizedKeys = node.querySelector('.unrecognized-keys');
+        unrecognizedKeys.hidden = false;
+        var list = unrecognizedKeys.querySelector('ul');
+        extension.unrecognizedKeys.forEach(function(key) {
+          list.appendChild(document.createElement('li')).innerText = key;
+        });
+      }
+
       this.appendChild(node);
     },
   };
 
   return {
     ExtensionsList: ExtensionsList
   };
 });