DevTools: Convert FilteredListWidget to use an optional provider

third_party/WebKit/Source/devtools/front_end/sources/StyleSheetOutlineDialog.js

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  * 1. Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *
@@ skipping 11 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 /**
  * @unrestricted
  */
-Sources.StyleSheetOutlineDialog = class extends QuickOpen.FilteredListWidget.Delegate {
+Sources.StyleSheetOutlineDialog = class extends QuickOpen.FilteredListWidget.Provider {
   /**
    * @param {!Workspace.UISourceCode} uiSourceCode
    * @param {function(number, number)} selectItemCallback
    */
   constructor(uiSourceCode, selectItemCallback) {
     super();
     this._selectItemCallback = selectItemCallback;
     /** @type {!Array<!Common.FormatterWorkerPool.CSSRule>} */
     this._rules = [];
     Common.formatterWorkerPool.parseCSS(uiSourceCode.workingCopy(), (isLastChunk, rules) => {
@@ skipping 62 matching lines @@
    */
   selectItem(itemIndex, promptValue) {
     if (itemIndex === null)
       return;
     var rule = this._rules[itemIndex];
     var lineNumber = rule.lineNumber;
     if (!isNaN(lineNumber) && lineNumber >= 0)
       this._selectItemCallback(lineNumber, rule.columnNumber);
   }
 };