DevTools: fix user agent custom behavior

third_party/WebKit/Source/devtools/front_end/network/NetworkConfigView.js

 // Copyright (c) 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
  * @extends {WebInspector.VBox}
  */
 WebInspector.NetworkConfigView = function()
 {
@@ skipping 108 matching lines @@
     otherUserAgentElement.addEventListener("keyup", textChanged, false);
 
     function userAgentSelected()
     {
         var value = userAgentSelectElement.options[userAgentSelectElement.selectedIndex].value;
         if (value !== customOverride.value) {
             userAgentSetting.set(value);
             otherUserAgentElement.value = value;
             otherUserAgentElement.title = value;
         } else {
-            otherUserAgentElement.focus();
+            otherUserAgentElement.select();
         }
     }
 
     function settingChanged()
     {
         var value = userAgentSetting.get();
         var options = userAgentSelectElement.options;
         var selectionRestored = false;
         for (var i = 0; i < options.length; ++i) {
             if (options[i].value === value) {
                 userAgentSelectElement.selectedIndex = i;
                 selectionRestored = true;
                 break;
             }
         }
 
         if (!selectionRestored)
             userAgentSelectElement.selectedIndex = 0;
-
-        if (otherUserAgentElement.value !== value) {
-            otherUserAgentElement.value = value;
-            otherUserAgentElement.title = value;
-        }
     }
 
     function textChanged()
     {
         if (userAgentSetting.get() !== otherUserAgentElement.value) {
             userAgentSetting.set(otherUserAgentElement.value);
+            otherUserAgentElement.title = otherUserAgentElement.value;
             settingChanged();
         }
     }
 
     return { select: userAgentSelectElement, input: otherUserAgentElement };
 }
 
 
 /** @type {!Array.<{title: string, values: !Array.<{title: string, value: string}>}>} */
 WebInspector.NetworkConfigView._userAgentGroups = [
@@ skipping 94 matching lines @@
      * @param {!WebInspector.Context} context
      * @param {string} actionId
      * @return {boolean}
      */
     handleAction: function(context, actionId)
     {
         WebInspector.inspectorView.showViewInDrawer("network.config");
         return true;
     }
 }