Pull web-animations-js into third-party via the third_party/polymer/reproduce.sh script. Add necess…

third_party/web-animations-js/sources/src/animation.js

+// Copyright 2014 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+//     You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//     See the License for the specific language governing permissions and
+// limitations under the License.
+
+(function(shared, scope, testing) {
+
+  scope.Animation = function(target, effectInput, timingInput) {
+    var animationNode = scope.AnimationNode(shared.normalizeTimingInput(timingInput));
+    var effect = scope.convertEffectInput(effectInput);
+    var timeFraction;
+    var animation = function() {
+      WEB_ANIMATIONS_TESTING && console.assert(typeof timeFraction !== 'undefined');
+      effect(target, timeFraction);
+    };
+    // Returns whether the animation is in effect or not after the timing update.
+    animation._update = function(localTime) {
+      timeFraction = animationNode(localTime);
+      return timeFraction !== null;
+    };
+    animation._clear = function() {
+      effect(target, null);
+    };
+    animation._hasSameTarget = function(otherTarget) {
+      return target === otherTarget;
+    };
+    animation._isCurrent = animationNode._isCurrent;
+    animation._totalDuration = animationNode._totalDuration;
+    return animation;
+  };
+
+  scope.NullAnimation = function(clear) {
+    var nullAnimation = function() {
+      if (clear) {
+        clear();
+        clear = null;
+      }
+    };
+    nullAnimation._update = function() {
+      return null;
+    };
+    nullAnimation._totalDuration = 0;
+    nullAnimation._isCurrent = function() {
+      return false;
+    };
+    nullAnimation._hasSameTarget = function() {
+      return false;
+    };
+    return nullAnimation;
+  };
+
+  if (WEB_ANIMATIONS_TESTING) {
+    testing.webAnimations1Animation = scope.Animation;
+  }
+
+})(webAnimationsShared, webAnimations1, webAnimationsTesting);