Fix Polymer licensing issues

third_party/web-animations-js/sources/src/timeline.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.AnimationTimeline = function() {
-    this._players = [];
-    this.currentTime = undefined;
-  };
-
-  scope.AnimationTimeline.prototype = {
-    // FIXME: This needs to return the wrapped players in Web Animations Next
-    // TODO: Does this need to be sorted?
-    // TODO: Do we need to consider needsRetick?
-    getAnimationPlayers: function() {
-      this._discardPlayers();
-      return this._players.slice();
-    },
-    _discardPlayers: function() {
-      this._players = this._players.filter(function(player) {
-        return player.playState != 'finished' && player.playState != 'idle';
-      });
-    },
-    play: function(source) {
-      var player = new scope.Player(source);
-      this._players.push(player);
-      scope.restartWebAnimationsNextTick();
-      player.play();
-      return player;
-    },
-  };
-
-  var ticking = false;
-
-  scope.restartWebAnimationsNextTick = function() {
-    if (!ticking) {
-      ticking = true;
-      requestAnimationFrame(webAnimationsNextTick);
-    }
-  };
-
-  function webAnimationsNextTick(t) {
-    var timeline = window.document.timeline;
-    timeline.currentTime = t;
-    timeline._discardPlayers();
-    if (timeline._players.length == 0)
-      ticking = false;
-    else
-      requestAnimationFrame(webAnimationsNextTick);
-  }
-
-  var timeline = new scope.AnimationTimeline();
-  scope.timeline = timeline;
-
-  try {
-    Object.defineProperty(window.document, 'timeline', {
-      configurable: true,
-      get: function() { return timeline; }
-    });
-  } catch (e) { }
-  try {
-    window.document.timeline = timeline;
-  } catch (e) { }
-
-})(webAnimationsShared, webAnimationsNext, webAnimationsTesting);