[MD History] Add routing to the synced devices page.

chrome/browser/resources/md_history/app.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/iron-flex-layout.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-pages/iron-pages.html">
 <link rel="import" href="chrome://history/grouped_list.html">
 <link rel="import" href="chrome://history/history_list.html">
 <link rel="import" href="chrome://history/history_toolbar.html">
 <link rel="import" href="chrome://history/synced_device_manager.html">
 <link rel="import" href="chrome://history/side_bar.html">
 <link rel="import" href="chrome://history/shared_style.html">
+<link rel="import" href="chrome://resources/polymer/v1_0/app-route/app-location.html">

[tsergeant, 2016/06/08 03:42:17]

Nit: Sort imports

[calamity, 2016/06/14 05:05:50]

Done.

+<link rel="import" href="chrome://resources/polymer/v1_0/app-route/app-route.html">
 <link rel="stylesheet" href="chrome://resources/css/md_colors.css">
 
 <dom-module id="history-app">
   <!-- TODO(calamity): work around this deprecated import style -->
   <template>
     <style no-process>
       history-toolbar {
         background: var(--md-toolbar-color);
       }
     </style>
@@ skipping 15 matching lines @@
       history-grouped-list {
         flex: 1 0 0;
       }
 
       #content {
         display: flex;
         flex: 1 0 0;
         overflow: hidden;
       }
     </style>
+
+    <app-location route="{{route}}"></app-location>
+    <app-route route="{{route}}" pattern="/:page" data="{{routeData}}">
+    </app-route>
     <history-toolbar id="toolbar" searching="[[queryState_.querying]]"
         is-grouped-mode="{{grouped_}}"
         grouped-range="{{queryState_.range}}"
         search-term="{{queryState_.searchTerm}}"
         query-start-time="[[queryState_.info.queryStartTime]]"
         query-end-time="[[queryState_.info.queryEndTime]]">
     </history-toolbar>
 
     <div id="main-container">
-      <history-side-bar id="history-side-bar" selected-page="{{selectedPage_}}">
+      <history-side-bar id="history-side-bar" selected-page="{{selectedPage}}"

[tsergeant, 2016/06/08 03:42:17]

The history-app property is called `selectedPage_`, not `selectedPage`, which
seems to be stopping this from working for me.

[calamity, 2016/06/14 05:05:50]

Done.

+          route-data="{{routeData}}">`

[tsergeant, 2016/06/08 03:42:17]

There's a sneaky ` character hiding out here.

[calamity, 2016/06/14 05:05:50]

Done.

       </history-side-bar>
       <iron-pages id="content" attr-for-selected="id"
           selected="[[getSelectedPage(selectedPage_, queryState_.range)]]">
         <history-list id="history-list" querying="[[queryState_.querying]]"
             searched-term="[[queryState_.info.term]]"></history-list>
         <template is="dom-if" if="[[grouped_]]">
           <history-grouped-list id="history-grouped-list"
               range="[[queryState_.range]]"
               query-start-time="[[queryState_.info.queryStartTime]]"
               query-end-time="[[queryState_.info.queryEndTime]]"
               searched-term="[[queryState_.info.term]]">
           </history-grouped-list>
         </template>
         <template is="dom-if" if="[[syncedTabsSelected_(selectedPage_)]]">
           <history-synced-device-manager id="history-synced-device-manager"
               session-list="[[queryState_.sessionList]]"
               searched-term=[[queryState_.info.term]]>
           </history-synced-device-manager>
         </template>
       </iron-pages>
     </div>
   </template>
   <script src="chrome://history/app.js"></script>
 </dom-module>