config_service: Add authentication to the UI.

appengine/config_service/ui/src/config-ui/config-set.html

 <!--
   Copyright 2017 The LUCI Authors. All rights reserved.
   Use of this source code is governed under the Apache License, Version 2.0
   that can be found in the LICENSE file.
 -->
 
 <link rel="import" href="config-file-card.html">
 <link rel="import" href="../../bower_components/iron-ajax/iron-ajax.html">
 <link rel="import" href="../../bower_components/paper-item/paper-item.html">
 <link rel="import" href="../../bower_components/polymer/polymer.html">
@@ skipping 16 matching lines @@
         font-size: 200%;
         font-family: sans-serif;
       }
 
       .title {
         padding-bottom: 1%;
         padding-top: 5%;
       }
     </style>
 
-    <iron-ajax
-        auto
-        id="requestConfigs"
-        url="/_ah/api/config/v1/config-sets?config_set=[[category]]%2F[[name]]&include_files=true"
-        handle-as="json"
-        on-response="_onGotConfigFiles">
-    </iron-ajax>
+    <template is="dom-if" if="[[!hidden]]">
+      <iron-ajax
+          auto
+          id="requestConfigs"
+          url="/_ah/api/config/v1/config-sets?config_set=[[category]]/[[name]][[route.path]]&include_files=true"
+          handle-as="json"
+          on-response="_onGotConfigFiles"
+          headers="{{auth_headers}}">
+      </iron-ajax>
+    </template>
 
     <div class="center title">
       <div class="name">[[name]][[route.path]]</div>
       <div class="category">[[_formatCategory(category)]]</div>
     </div>
 
     <template is="dom-if" if="[[isLoading]]">
       <div class="center">Fetching config files...</div>
     </template>
-    <template is="dom-if" if="[[_not(isLoading)]]">
+    <template is="dom-if" if="[[!isLoading]]">
       <template is="dom-repeat" items="[[files]]" as="file">
         <config-file-card
             name="[[file.path]]" link="[[location]]/[[file.path]]">
         </config-file-card>
       </template>
     </template>
   </template>
   <script>
     Polymer({
       is: "config-set",
@@ skipping 19 matching lines @@
         name: {
           type: String
         }
       },
 
       _formatCategory: function(category) {
         if (category === "projects") return "Project";
         if (category === "services") return "Service";
       },
 
-      _not: function(b) {
-        return !b;
-      },
-
       _onGotConfigFiles: function(event) {
         this.files = event.detail.response.config_sets[0].files;
         this.location = event.detail.response.config_sets[0].location;
         this.isLoading = false;
       }
     });
   </script>
 </dom-module>