Remove third_party/polymer from .gitignore

third_party/polymer/v1_0/components/neon-animation/neon-animatable-behavior.html

-<!--
-Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
-This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
-The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
-The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
-Code distributed by Google as part of the polymer project is also
-subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
--->
-
-<link rel="import" href="../polymer/polymer.html">
-<link rel="import" href="animations/opaque-animation.html">
-
-<script>
-
-  /**
-   * `Polymer.NeonAnimatableBehavior` is implemented by elements containing animations for use with
-   * elements implementing `Polymer.NeonAnimationRunnerBehavior`.
-   * @polymerBehavior
-   */
-  Polymer.NeonAnimatableBehavior = {
-
-    properties: {
-
-      /**
-       * Animation configuration. See README for more info.
-       */
-      animationConfig: {
-        type: Object
-      },
-
-      /**
-       * Convenience property for setting an 'entry' animation. Do not set `animationConfig.entry`
-       * manually if using this. The animated node is set to `this` if using this property.
-       */
-      entryAnimation: {
-        observer: '_entryAnimationChanged',
-        type: String
-      },
-
-      /**
-       * Convenience property for setting an 'exit' animation. Do not set `animationConfig.exit`
-       * manually if using this. The animated node is set to `this` if using this property.
-       */
-      exitAnimation: {
-        observer: '_exitAnimationChanged',
-        type: String
-      }
-
-    },
-
-    _entryAnimationChanged: function() {
-      this.animationConfig = this.animationConfig || {};
-      if (this.entryAnimation !== 'fade-in-animation') {
-        // insert polyfill hack
-        this.animationConfig['entry'] = [{
-          name: 'opaque-animation',
-          node: this
-        }, {
-          name: this.entryAnimation,
-          node: this
-        }];
-      } else {
-        this.animationConfig['entry'] = [{
-          name: this.entryAnimation,
-          node: this
-        }];
-      }
-    },
-
-    _exitAnimationChanged: function() {
-      this.animationConfig = this.animationConfig || {};
-      this.animationConfig['exit'] = [{
-        name: this.exitAnimation,
-        node: this
-      }];
-    },
-
-    _copyProperties: function(config1, config2) {
-      // shallowly copy properties from config2 to config1
-      for (var property in config2) {
-        config1[property] = config2[property];
-      }
-    },
-
-    _cloneConfig: function(config) {
-      var clone = {
-        isClone: true
-      };
-      this._copyProperties(clone, config);
-      return clone;
-    },
-
-    _getAnimationConfigRecursive: function(type, map, allConfigs) {
-      if (!this.animationConfig) {
-        return;
-      }
-
-      // type is optional
-      var thisConfig;
-      if (type) {
-        thisConfig = this.animationConfig[type];
-      } else {
-        thisConfig = this.animationConfig;
-      }
-
-      if (!Array.isArray(thisConfig)) {
-        thisConfig = [thisConfig];
-      }
-
-      // iterate animations and recurse to process configurations from child nodes
-      if (thisConfig) {
-        for (var config, index = 0; config = thisConfig[index]; index++) {
-          if (config.animatable) {
-            config.animatable._getAnimationConfigRecursive(config.type || type, map, allConfigs);
-          } else {
-            if (config.id) {
-              var cachedConfig = map[config.id];
-              if (cachedConfig) {
-                // merge configurations with the same id, making a clone lazily
-                if (!cachedConfig.isClone) {
-                  map[config.id] = this._cloneConfig(cachedConfig)
-                  cachedConfig = map[config.id];
-                }
-                this._copyProperties(cachedConfig, config);
-              } else {
-                // put any configs with an id into a map
-                map[config.id] = config;
-              }
-            } else {
-              allConfigs.push(config);
-            }
-          }
-        }
-      }
-    },
-
-    /**
-     * An element implementing `Polymer.NeonAnimationRunnerBehavior` calls this method to configure
-     * an animation with an optional type. Elements implementing `Polymer.NeonAnimatableBehavior`
-     * should define the property `animationConfig`, which is either a configuration object
-     * or a map of animation type to array of configuration objects.
-     */
-    getAnimationConfig: function(type) {
-      var map = [];
-      var allConfigs = [];
-      this._getAnimationConfigRecursive(type, map, allConfigs);
-      // append the configurations saved in the map to the array
-      for (var key in map) {
-        allConfigs.push(map[key]);
-      }
-      return allConfigs;
-    }
-
-  };
-
-</script>