Web Animations: Update naming to reflect spec changes

LayoutTests/web-animations-api/transitions-replay.html

Index: LayoutTests/web-animations-api/transitions-replay.html
diff --git a/LayoutTests/web-animations-api/transitions-replay.html b/LayoutTests/web-animations-api/transitions-replay.html
index 8849de939349cd48c976a9f57559feed7a2bc5ea..083b041a78358c49dfd8c775e6e6b565f00763e8 100644
--- a/LayoutTests/web-animations-api/transitions-replay.html
+++ b/LayoutTests/web-animations-api/transitions-replay.html
@@ -16,13 +16,13 @@ t.step(function() {
     element.style.background = "green";
     element.offsetTop; // Force recalc
 
-    assert_equals(document.timeline.getAnimationPlayers().length, 1);
-    var player = document.timeline.getAnimationPlayers()[0];
-    player.onfinish = function() {
+    assert_equals(document.timeline.getAnimations().length, 1);
+    var animation = document.timeline.getAnimations()[0];
+    animation.onfinish = function() {
         requestAnimationFrame(function() {
             requestAnimationFrame(function() {
-                player.startTime = document.timeline.currentTime - 10;
-                player.onfinish = t.done.bind(t);
+                animation.startTime = document.timeline.currentTime - 10;
+                animation.onfinish = t.done.bind(t);
             });
         });
     }