DevTools: Update CommandMenuProvider on attach instead of construction

third_party/WebKit/Source/devtools/front_end/quick_open/CommandMenu.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.
 /**
  * @unrestricted
  */
 QuickOpen.CommandMenu = class {
   constructor() {
     this._commands = [];
     this._loadCommands();
@@ skipping 95 matching lines @@
    */
   commands() {
     return this._commands;
   }
 };
 
 QuickOpen.CommandMenuProvider = class extends QuickOpen.FilteredListWidget.Provider {
   constructor() {
     super();
     this._commands = [];
-    this._appendAvailableCommands();
   }
 
-  _appendAvailableCommands() {
+  /**
+   * @override
+   */
+  attach() {
     var allCommands = QuickOpen.commandMenu.commands();
 
     // Populate whitelisted actions.
     var actions = UI.actionRegistry.availableActions();
     for (var action of actions) {
       if (action.category())
         this._commands.push(QuickOpen.CommandMenu.createActionCommand(action));
     }
 
     for (var command of allCommands) {
       if (command.available())
         this._commands.push(command);
     }
 
     this._commands = this._commands.sort(commandComparator);
 
     /**
      * @param {!QuickOpen.CommandMenu.Command} left
      * @param {!QuickOpen.CommandMenu.Command} right
      * @return {number}
      */
     function commandComparator(left, right) {
       var cats = left.category().compareTo(right.category());
       return cats ? cats : left.title().compareTo(right.title());
     }
   }
 
   /**
    * @override
+   */
+  detach() {
+    this._commands = [];
+  }
+
+  /**
+   * @override
    * @return {number}
    */
   itemCount() {
     return this._commands.length;
   }
 
   /**
    * @override
    * @param {number} itemIndex
    * @return {string}
@@ skipping 146 matching lines @@
    * @override
    * @param {!UI.Context} context
    * @param {string} actionId
    * @return {boolean}
    */
   handleAction(context, actionId) {
     QuickOpen.QuickOpen.show('>');
     return true;
   }
 };