Bug 1212720 - Part 4: Remove all cancelAllAnimationsOnEnd. It is not needed any more. r=bbirtles

--HG--
extra : histedit_source : 1470ef2dfe10559b5761c6eb6a384a610d883718

dom/animation/test/css-animations/file_document-get-animations.html

@@ -145,8 +145,6 @@ test(function(t) {
 }, 'Order of CSS Animations - across and within elements');
 
 test(function(t) {
-  cancelAllAnimationsOnEnd(t);
-
   var div = addDiv(t, { style: 'animation: animLeft 100s, animTop 100s' });
   var animLeft = document.getAnimations()[0];
   assert_equals(animLeft.animationName, 'animLeft',
@@ -165,8 +163,6 @@ test(function(t) {
 }, 'Order of CSS Animations - markup-bound vs free animations');
 
 test(function(t) {
-  cancelAllAnimationsOnEnd(t);
-
   var div = addDiv(t, { style: 'animation: animLeft 100s, animTop 100s' });
   var animLeft = document.getAnimations()[0];
   var animTop  = document.getAnimations()[1];
@@ -239,8 +235,6 @@ test(function(t) {
 }, 'CSS Animations cancelled via the API are not returned');
 
 test(function(t) {
-  cancelAllAnimationsOnEnd(t);
-
   var div = addDiv(t, { style: 'animation: animLeft 100s' });
   var anim = div.getAnimations()[0];
   anim.cancel();

dom/animation/test/testcommon.js

@@ -29,18 +29,6 @@ function addDiv(t, attrs) {
   return div;
 }
 
-/**
- * Some tests cause animations to continue to exist even after their target
- * element has been removed from the document tree. To ensure that these
- * animations do not impact other tests we should cancel them when the test
- * is complete.
- */
-function cancelAllAnimationsOnEnd(t) {
-  t.add_cleanup(function() {
-    document.getAnimations().forEach(animation => animation.cancel());
-  });
-}
-
 /**
  * Promise wrapper for requestAnimationFrame.
  */