DevTools: Create extensible QuickOpen control

third_party/WebKit/Source/devtools/front_end/sources/FilteredUISourceCodeListProvider.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.
  */
 
 /**
  * @unrestricted
  */
 Sources.FilteredUISourceCodeListProvider = class extends QuickOpen.FilteredListWidget.Provider {
   /**
-   * @param {!Map.<!Workspace.UISourceCode, number>=} defaultScores
+   * @param {?Map.<!Workspace.UISourceCode, number>=} defaultScores
    */
   constructor(defaultScores) {
     super();
 
-    this._defaultScores = defaultScores;
+    this._defaultScores = defaultScores || null;
     this._scorer = new Sources.FilePathScoreFunction('');
   }
 
   /**
    * @param {!Common.Event} event
    */
   _projectRemoved(event) {
     var project = /** @type {!Workspace.Project} */ (event.data);
     this._populate(project);
     this.refresh();
@@ skipping 52 matching lines @@
   /**
    * @override
    * @param {number} itemIndex
    * @return {string}
    */
   itemKeyAt(itemIndex) {
     return this._uiSourceCodes[itemIndex].url();
   }
 
   /**
+   * @protected
+   * @param {?Map.<!Workspace.UISourceCode, number>} defaultScores
+   */
+  setDefaultScores(defaultScores) {
+    this._defaultScores = defaultScores;
+  }
+
+  /**
    * @override
    * @param {number} itemIndex
    * @param {string} query
    * @return {number}
    */
   itemScoreAt(itemIndex, query) {
     var uiSourceCode = this._uiSourceCodes[itemIndex];
     var score = this._defaultScores ? (this._defaultScores.get(uiSourceCode) || 0) : 0;
     if (!query || query.length < 2)
       return score;
@@ skipping 120 matching lines @@
 
   /**
    * @override
    */
   detach() {
     Workspace.workspace.removeEventListener(
         Workspace.Workspace.Events.UISourceCodeAdded, this._uiSourceCodeAdded, this);
     Workspace.workspace.removeEventListener(Workspace.Workspace.Events.ProjectRemoved, this._projectRemoved, this);
   }
 };