DevTools: [SuggestBox] migrate suggestbox icons onto UI.Icon

third_party/WebKit/Source/devtools/front_end/console/ConsolePrompt.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
  */
 Console.ConsolePrompt = class extends UI.Widget {
   constructor() {
     super();
     this._addCompletionsFromHistory = true;
@@ skipping 200 matching lines @@
     var text = this.text();
     var set = new Set();
     var data = this._history.historyData();
     for (var i = data.length - 1; i >= 0 && result.length < 50; --i) {
       var item = data[i];
       if (!item.startsWith(text))
         continue;
       if (set.has(item))
         continue;
       set.add(item);
-      result.push({title: item.substring(text.length - prefix.length), className: 'additional'});
+      result.push(
+          {title: item.substring(text.length - prefix.length), iconType: 'smallicon-text-prompt', isSecondary: true});
     }
     return result;
   }
 
   /**
    * @override
    */
   focus() {
     if (this._editor)
       this._editor.widget().focus();
@@ skipping 124 matching lines @@
     return this._currentHistoryItem();
   }
 
   /**
    * @return {string|undefined}
    */
   _currentHistoryItem() {
     return this._data[this._data.length - this._historyOffset];
   }
 };