[third_party] add polymer 1.2.3

polymer_1.2.3/bower_components/iron-media-query/iron-media-query.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">
@@ skipping 30 matching lines @@
         readOnly: true,
         notify: true
       },
 
       /**
        * The CSS media query to evaluate.
        */
       query: {
         type: String,
         observer: 'queryChanged'
+      },
+
+      /**
+       * If true, the query attribute is assumed to be a complete media query
+       * string rather than a single media feature.
+       */
+      full: {
+        type: Boolean,
+        value: false
+      },
+
+      /**
+       * @type {function(MediaQueryList)}
+       */
+      _boundMQHandler: {
+        value: function() {
+          return this.queryHandler.bind(this);
+        }
+      },
+
+      /**
+       * @type {MediaQueryList}
+       */
+      _mq: {
+        value: null
       }
-
     },
 
-    created: function() {
-      this._mqHandler = this.queryHandler.bind(this);
+    attached: function() {
+      this.style.display = 'none';
+      this.queryChanged();
     },
 
-    queryChanged: function(query) {
+    detached: function() {
+      this._remove();
+    },
+
+    _add: function() {
       if (this._mq) {
-        this._mq.removeListener(this._mqHandler);
+        this._mq.addListener(this._boundMQHandler);
       }
-      if (query[0] !== '(') {
+    },
+
+    _remove: function() {
+      if (this._mq) {
+        this._mq.removeListener(this._boundMQHandler);
+      }
+      this._mq = null;
+    },
+
+    queryChanged: function() {
+      this._remove();
+      var query = this.query;
+      if (!query) {
+        return;
+      }
+      if (!this.full && query[0] !== '(') {
         query = '(' + query + ')';
       }
       this._mq = window.matchMedia(query);
-      this._mq.addListener(this._mqHandler);
+      this._add();
       this.queryHandler(this._mq);
     },
 
     queryHandler: function(mq) {
       this._setQueryMatches(mq.matches);
     }
 
   });
 
 </script>