Fix Polymer licensing issues

third_party/web-animations-js/sources/src/deprecation.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) {
-
-  var silenced = {};
-
-  shared.isDeprecated = function(feature, date, advice, plural) {
-    var auxVerb = plural ? 'are' : 'is';
-    var today = new Date();
-    var expiry = new Date(date);
-    expiry.setMonth(expiry.getMonth() + 3); // 3 months grace period
-
-    if (today < expiry) {
-      if (!(feature in silenced)) {
-        console.warn('Web Animations: ' + feature + ' ' + auxVerb + ' deprecated and will stop working on ' + expiry.toDateString() + '. ' + advice);
-      }
-      silenced[feature] = true;
-      return false;
-    } else {
-      return true;
-    }
-  };
-
-  shared.deprecated = function(feature, date, advice, plural) {
-    if (shared.isDeprecated(feature, date, advice, plural)) {
-      throw new Error(feature + ' ' + auxVerb + ' no longer supported. ' + advice);
-    }
-  };
-
-})(webAnimationsShared);