Update Polymer components.

third_party/polymer/components/web-animations-js/src/scope.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.
+
+var webAnimationsShared = {};
+var webAnimations1 = {};
+var webAnimationsNext = {};
+
+if (!WEB_ANIMATIONS_TESTING)
+  var webAnimationsTesting = null;