Add (uneditable) display of extension keywords to the search engine manager.

chrome/browser/resources/options/search_engine_manager_engine_list.js

 // Copyright (c) 2011 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.search_engines', function() {
   const InlineEditableItemList = options.InlineEditableItemList;
   const InlineEditableItem = options.InlineEditableItem;
   const ListSelectionController = cr.ui.ListSelectionController;
 
   /**
@@ skipping 142 matching lines @@
         this.urlField_.placeholder =
             localStrings.getString('searchEngineTableURLPlaceholder');
       }
 
       var fields = [ this.nameField_, this.keywordField_, this.urlField_ ];
         for (var i = 0; i < fields.length; i++) {
         fields[i].oninput = this.startFieldValidation_.bind(this);
       }
 
       // Listen for edit events.
-      this.addEventListener('edit', this.onEditStarted_.bind(this));
-      this.addEventListener('canceledit', this.onEditCancelled_.bind(this));
-      this.addEventListener('commitedit', this.onEditCommitted_.bind(this));
+      if (engine['canBeEdited']) {
+        this.addEventListener('edit', this.onEditStarted_.bind(this));
+        this.addEventListener('canceledit', this.onEditCancelled_.bind(this));
+        this.addEventListener('commitedit', this.onEditCommitted_.bind(this));
+      } else {
+        this.editable = false;
+      }
     },
 
     /** @inheritDoc */
     get currentInputIsValid() {
       return !this.waitingForValidation_ && this.currentlyValid_;
     },
 
     /** @inheritDoc */
     get hasBeenEdited() {
       var engine = this.searchEngine_;
@@ skipping 127 matching lines @@
     },
   };
 
   // Export
   return {
     SearchEngineList: SearchEngineList
   };
 
 });