DOMUI Prefs: Add inline buttons for setting the default search engine

chrome/browser/resources/options/search_engine_manager.js

 // Copyright (c) 2010 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() {
   const OptionsPage = options.OptionsPage;
   const ArrayDataModel = cr.ui.ArrayDataModel;
   const ListSingleSelectionModel = cr.ui.ListSingleSelectionModel;
 
   /**
@@ skipping 14 matching lines @@
     list_: null,
 
     initializePage: function() {
       OptionsPage.prototype.initializePage.call(this);
 
       this.list_ = $('searchEngineList')
       options.search_engines.SearchEngineList.decorate(this.list_);
       var selectionModel = new ListSingleSelectionModel;
       this.list_.selectionModel = selectionModel;
       this.list_.autoExpands = true;
-
-      selectionModel.addEventListener('change',
-          this.selectionChanged_.bind(this));
-
-      var self = this;
-      // This is a temporary hack to allow the "Make Default" button to
-      // continue working despite the new list behavior of removing selection
-      // on focus loss.
-      // Once drag-and-drop is supported, so items can be moved into the default
-      // section, this button will go away entirely.
-      $('makeDefaultSearchEngineButton').onmousedown = function(event) {
-        self.pendingDefaultEngine_ = self.list_.selectedItem;
-      };
-      $('makeDefaultSearchEngineButton').onclick = function(event) {
-        chrome.send('managerSetDefaultSearchEngine',
-                    [self.pendingDefaultEngine_['modelIndex']]);
-        self.pendingDefaultEngine_ = null;
-      };
     },
 
     /**
      * Updates the search engine list with the given entries.
      * @private
      * @param {Array} engineList List of available search engines.
      */
     updateSearchEngineList_: function(engineList) {
       var model = new ArrayDataModel(engineList);
       model.push({
         'modelIndex': '-1'
       });
       this.list_.dataModel = model;
     },
-
-    /**
-     * Callback from the selection model when the selection changes.
-     * @private
-     * @param {!cr.Event} e Event with change info.
-     */
-    selectionChanged_: function(e) {
-      var engine = this.list_.selectedItem || this.pendingDefaultEngine_;
-      $('makeDefaultSearchEngineButton').disabled =
-          !(engine && engine['canBeDefault']);
-    },
   };
 
   SearchEngineManager.updateSearchEngineList = function(engineList) {
     SearchEngineManager.getInstance().updateSearchEngineList_(engineList);
   };
 
   SearchEngineManager.validityCheckCallback = function(validity, modelIndex) {
     SearchEngineManager.getInstance().list_.validationComplete(validity,
                                                                modelIndex);
   };
 
   // Export
   return {
     SearchEngineManager: SearchEngineManager
   };
 
 });