Support additive animations on CSS property transform

third_party/WebKit/LayoutTests/animations/responsive/resources/responsive-test.js

 // Copyright 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.
 
 /*
 Exported functions:
 assertCSSResponsive
 assertSVGResponsive
 
 Exported objects:
@@ skipping 125 matching lines @@
 
 function createTargets(bindings, n, container) {
   var targets = [];
   for (var i = 0; i < n; i++) {
     targets.push(bindings.createTarget(container));
   }
   return targets;
 }
 
 function setState(bindings, targets, property, state) {
-  if (state.inherited) {
-    var parent = targets[0].parentElement;
-    console.assert(targets.every(target => target.parentElement === parent));
-    bindings.setValue(parent, property, state.inherited);
-  }
-  if (state.underlying) {
-    for (var target of targets) {
-      bindings.setValue(target, property, state.underlying);
+  for (var item in state) {
+    switch (item) {
+    case 'inherited':
+      var parent = targets[0].parentElement;
+      console.assert(targets.every(target => target.parentElement === parent));
+      bindings.setValue(parent, property, state.inherited);
+      break;
+    case 'underlying':
+      for (var target of targets) {
+        bindings.setValue(target, property, state.underlying);
+      }
+      break;
+    default:
+      for (var target of targets) {
+        bindings.setValue(target, item, state[item]);
+      }
+      break;
     }
   }
 }
 
 function isNeutralKeyframe(keyframe) {
   return keyframe === neutralKeyframe;
 }
 
 function keyframeText(keyframe) {
   return isNeutralKeyframe(keyframe) ? 'neutral' : `[${keyframe}]`;
@@ skipping 113 matching lines @@
     asyncHandle.done();
   });
 });
 
 
 window.assertCSSResponsive = assertCSSResponsive;
 window.assertSVGResponsive = assertSVGResponsive;
 window.neutralKeyframe = neutralKeyframe;
 
 })();