[DevTools] When selected network preset is remove, select another one.

third_party/WebKit/Source/devtools/front_end/components/NetworkConditionsSelector.js

 // Copyright 2015 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.
 
 /**
  * @constructor
  * @param {function(!Array<!WebInspector.NetworkConditionsGroup>):!Array<?WebInspector.NetworkManager.Conditions>} populateCallback
  * @param {function(number)} selectCallback
  */
 WebInspector.NetworkConditionsSelector = function(populateCallback, selectCallback)
@@ skipping 58 matching lines @@
     return {text: title, title: WebInspector.UIString("Maximum download throughput: %s.\r\nMaximum upload throughput: %s.\r\nMinimum round-trip time: %dms.", downloadText, uploadText, conditions.latency)};
 }
 
 WebInspector.NetworkConditionsSelector.prototype = {
     _populateOptions: function()
     {
         var customGroup = {title: WebInspector.UIString("Custom"), items: this._customSetting.get()};
         var presetsGroup = {title: WebInspector.UIString("Presets"), items: WebInspector.NetworkConditionsSelector._presets};
         var disabledGroup = {title: WebInspector.UIString("Disabled"), items: [WebInspector.NetworkManager.NoThrottlingConditions]};
         this._options = this._populateCallback([customGroup, presetsGroup, disabledGroup]);
-        this._conditionsChanged();
+        if (!this._conditionsChanged()) {
+            for (var i = this._options.length - 1; i >= 0; i--) {
+                if (this._options[i]) {
+                    this.optionSelected(/** @type {!WebInspector.NetworkManager.Conditions} */ (this._options[i]));
+                    break;
+                }
+            }
+        }
     },
 
     revealAndUpdate: function()
     {
         WebInspector.Revealer.reveal(this._customSetting);
         this._conditionsChanged();
     },
 
     /**
      * @param {!WebInspector.NetworkManager.Conditions} conditions
      */
     optionSelected: function(conditions)
     {
         this._manager.setNetworkConditions(conditions);
     },
 
+    /**
+     * @return {boolean}
+     */
     _conditionsChanged: function()
     {
         var value = this._manager.networkConditions();
         for (var index = 0; index < this._options.length; ++index) {
             var option = this._options[index];
-            if (!option)
-                continue;
-            if (option.download === value.download && option.upload === value.upload && option.latency === value.latency && option.title === value.title)
+            if (option && option.download === value.download && option.upload === value.upload && option.latency === value.latency && option.title === value.title) {
                 this._selectCallback(index);
+                return true;
+            }
         }
+        return false;
     }
 }
 
 /**
  * @param {!HTMLSelectElement} selectElement
  */
 WebInspector.NetworkConditionsSelector.decorateSelect = function(selectElement)
 {
     var options = [];
     var selector = new WebInspector.NetworkConditionsSelector(populate, select);
@@ skipping 300 matching lines @@
          */
         function latencyValidator(item, index, input)
         {
             var value = input.value.trim();
             return !value || (/^[\d]+$/.test(value) && value >= 0 && value <= 1000000);
         }
     },
 
     __proto__: WebInspector.VBox.prototype
 }