MD History: Add routing for grouped history mode.

chrome/browser/resources/md_history/app.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/html/cr/ui.html">
 <link rel="import" href="chrome://resources/html/cr/ui/command.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-media-query/iron-media-query.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-pages/iron-pages.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-scroll-target-behavior/iron-scroll-target-behavior.html">
 <link rel="import" href="chrome://history/history_toolbar.html">
 <link rel="import" href="chrome://history/list_container.html">
 <link rel="import" href="chrome://history/query_manager.html">
 <link rel="import" href="chrome://history/router.html">
@@ skipping 51 matching lines @@
         right: 0;
         top: 0;
         transition: opacity 500ms;
       }
 
       :host([toolbar-shadow_]) #drop-shadow {
         opacity: 1;
       }
     </style>
     <history-query-manager query-state="{{queryState_}}"
-        query-result="[[queryResult_]]">
+        query-result="[[queryResult_]]"
+        router="[[$$('#router')]]">
     </history-query-manager>
-    <history-router selected-page="{{selectedPage_}}"
+    <history-router id="router"
+        selected-page="{{selectedPage_}}"
+        grouped="[[grouped_]]"
         query-state="[[queryState_]]">
     </history-router>
     <history-toolbar id="toolbar"
         grouped-offset="[[queryState_.groupedOffset]]"
         grouped-range="[[queryState_.range]]"
         has-drawer="[[hasDrawer_]]"
         has-more-results="[[!queryResult_.info.finished]]"
         is-grouped-mode="[[grouped_]]"
         query-info="[[queryResult_.info]]"
         querying="[[queryState_.querying]]"
@@ skipping 39 matching lines @@
         </history-side-bar>
       </dialog>
     </template>
 
     <iron-media-query query="(max-width: 1023px)"
         query-matches="{{hasDrawer_}}">
     </iron-media-query>
   </template>
   <script src="chrome://history/app.js"></script>
 </dom-module>