fixed about:flags by switching onclick to onchange for select element

chrome/browser/resources/flags.js

 // Copyright (c) 2011 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.
 
 /**
  * This variable structure is here to document the structure that the template
  * expects to correctly populate the page.
  */
 var flagsExperimentsDataFormat = {
   'flagsExperiments': [
@@ skipping 29 matching lines @@
  */
 function renderTemplate(flagsExperimentsData) {
   // This is the javascript code that processes the template:
   var input = new JsEvalContext(flagsExperimentsData);
   var output = document.getElementById('flagsExperimentTemplate');
   jstProcess(input, output);
 
   // Add handlers to dynamically created HTML elements.
   var elements = document.getElementsByClassName('experiment-select');
   for (var i = 0; i < elements.length; ++i) {
-    elements[i].onclick = function () {
+    elements[i].onchange = function () {
       handleSelectChoiceExperiment(this, this.selectedIndex);
       return false;
     };
   }
 
   elements = document.getElementsByClassName('experiment-disable-link');
   for (var i = 0; i < elements.length; ++i) {
     elements[i].onclick = function () {
       handleEnableExperiment(this, false);
       return false;
@@ skipping 57 matching lines @@
 function handleSelectChoiceExperiment(node, index) {
   // Tell the C++ FlagsDOMHandler to enable the selected choice.
   chrome.send('enableFlagsExperiment',
               [String(node.internal_name) + "@" + index, "true"]);
   requestFlagsExperimentsData();
 }
 
 // Get data and have it displayed upon loading.
 document.addEventListener('DOMContentLoaded', requestFlagsExperimentsData);