Added Polymer 0.5.4

polymer_0.5.4/bower_components/paper-dropdown-menu/paper-dropdown-menu.html

 <!--
 Copyright (c) 2014 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
 -->
 
 <!--
@@ skipping 18 matching lines @@
                 <paper-item>Madeleine</paper-item>
             </core-menu>
         </paper-dropdown>
     </paper-dropdown-menu>
 
 This example renders a drop-down menu with 4 options.
 
 @group Paper Elements
 @element paper-dropdown-menu
 @extends core-dropdown-base
+@mixins Polymer.CoreFocusable https://github.com/polymer/core-focusable
 @status unstable
 @homepage github.io
 -->
 
 <!--
 Fired when an item's selection state is changed. This event is fired both
 when an item is selected or deselected. The `isSelected` detail property
 contains the selection state.
 
 @event core-select
@@ skipping 37 matching lines @@
       -ms-user-select: none;
       -webkit-user-select: none;
       user-select: none;
       cursor: pointer;
       padding: 0.5em 0 0.25em;
       margin: 0.75em 0;
       border-bottom: 1px solid #757575;
       outline: none;
     }
 
-    #label, #arrow {
+    #label:not(.selectedItem), #arrow {
       color: #757575;
     }
 
     #label {
       overflow: hidden;
       white-space: nowrap;
       text-overflow: ellipsis;
     }
   </style>
 
@@ skipping 50 matching lines @@
       'core-select': 'selectAction'
     },
 
     activateAction: function(e) {
       this.opened = false;
     },
 
     selectAction: function(e) {
       var detail = e.detail;
       if (detail.isSelected) {
+        this.$.label.classList.add('selectedItem');
         this.selectedItemLabel = detail.item.label || detail.item.textContent;
       } else {
+        this.$.label.classList.remove('selectedItem');
         this.selectedItemLabel = '';
       }
     }
 
   };
 
   Polymer.mixin2(p, Polymer.CoreFocusable);
   Polymer(p);
 
 })();
 
 </script>
 </polymer-element>