Fix Test.disableAnimationsAndTransitions to work with new /deep/

chrome/test/data/webui/test_api.js

 // Copyright (c) 2012 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.
 
 /**
  * @fileoverview Library providing basic test framework functionality.
  */
 
 // See assert.js for where this is used.
 this.traceAssertionsForTesting = true;
@@ skipping 35 matching lines @@
    * @constructor
    */
   function Test() {};
 
   /**
    * Make all transitions and animations take 0ms. NOTE: this will completely
    * disable webkitTransitionEnd events. If your code relies on them firing, it
    * will break. animationend events should still work.
    */
   Test.disableAnimationsAndTransitions = function() {
-    var noAnimationStyle = document.createElement('style');
-    noAnimationStyle.id = 'no-animation';
-    noAnimationStyle.textContent =
-      '*, * /deep/ * {' +
-      '  -webkit-transition-duration: 0ms !important;' +
-      '  -webkit-transition-delay: 0ms !important;' +
-      '  animation-duration: 0ms !important;' +
-      '  animation-delay: 0ms !important;' +
-      '}';
-    document.querySelector('head').appendChild(noAnimationStyle);
+    let all = document.body.querySelectorAll('*, * /deep/ *');
+    const ZERO_MS_IMPORTANT = '0ms !important';
+    for (let i = 0, l = all.length; i < l; ++i) {
+      let style = all[i].style;
+      style.animationDelay = ZERO_MS_IMPORTANT;
+      style.animationDuration = ZERO_MS_IMPORTANT;
+      style.transitionDelay = ZERO_MS_IMPORTANT;
+      style.transitionDuration = ZERO_MS_IMPORTANT;
+    }
 
     var realElementAnimate = Element.prototype.animate;
     Element.prototype.animate = function(keyframes, opt_options) {
       if (typeof opt_options == 'object')
         opt_options.duration = 0;
       else
         opt_options = 0;
       return realElementAnimate.call(this, keyframes, opt_options);
     };
     if (document.timeline && document.timeline.play) {
@@ skipping 1677 matching lines @@
   exports.runTest = runTest;
   exports.runTestFunction = runTestFunction;
   exports.DUMMY_URL = DUMMY_URL;
   exports.TEST = TEST;
   exports.TEST_F = TEST_F;
   exports.RUNTIME_TEST_F = TEST_F;
   exports.GEN = GEN;
   exports.GEN_INCLUDE = GEN_INCLUDE;
   exports.WhenTestDone = WhenTestDone;
 })(this);