Support additive animations on CSS property transform

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

Index: third_party/WebKit/LayoutTests/animations/responsive/resources/responsive-test.js
diff --git a/third_party/WebKit/LayoutTests/animations/responsive/resources/responsive-test.js b/third_party/WebKit/LayoutTests/animations/responsive/resources/responsive-test.js
index 05f803e2fa2211aa6491316bf7c594590cc58b4f..5a35f5c3c45b51304f4bf499828c0d075c21138b 100644
--- a/third_party/WebKit/LayoutTests/animations/responsive/resources/responsive-test.js
+++ b/third_party/WebKit/LayoutTests/animations/responsive/resources/responsive-test.js
@@ -143,14 +143,23 @@ function createTargets(bindings, n, container) {
 }
 
 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;
     }
   }
 }