DevTools: simplify network throttling presets

third_party/WebKit/Source/devtools/front_end/network_conditions/NetworkConditionsSettingsTab.js

 // Copyright 2017 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.
 
 /**
  * @implements {UI.ListWidget.Delegate}
  * @unrestricted
  */
 NetworkConditions.NetworkConditionsSettingsTab = class extends UI.VBox {
   constructor() {
@@ skipping 27 matching lines @@
   }
 
   _conditionsUpdated() {
     this._list.clear();
 
     var conditions = this._customSetting.get();
     for (var i = 0; i < conditions.length; ++i)
       this._list.appendItem(conditions[i], true);
 
     this._list.appendSeparator();
-
-    conditions = NetworkConditions.NetworkConditionsSelector.presets;
-    for (var i = 0; i < conditions.length; ++i)
-      this._list.appendItem(conditions[i], false);
   }
 
   _addButtonClicked() {
     this._list.addNewItem(this._customSetting.get().length, {title: '', download: -1, upload: -1, latency: 0});
   }
 
   /**
    * @override
    * @param {*} item
    * @param {boolean} editable
@@ skipping 134 matching lines @@
      * @param {number} index
      * @param {!HTMLInputElement|!HTMLSelectElement} input
      * @return {boolean}
      */
     function latencyValidator(item, index, input) {
       var value = input.value.trim();
       return !value || (/^[\d]+$/.test(value) && value >= 0 && value <= 1000000);
     }
   }
 };