[MD History] Add UMA stats for switching views and the CBD button.

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/app-layout/app-drawer/app-drawer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/app-route/app-location.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/app-route/app-route.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://history/history_toolbar.html">
 <link rel="import" href="chrome://history/list_container.html">
@@ skipping 70 matching lines @@
       <history-side-bar id="content-side-bar" selected-page="[[selectedPage_]]"
           route="[[route_]]" show-footer="[[showSidebarFooter]]"
           hidden$="[[hasDrawer_]]">
       </history-side-bar>
       <iron-pages id="content" attr-for-selected="path"
           fallback-selection="history"
           selected="[[getSelectedPage_(selectedPage_, items)]]"
           items="{{items}}">
         <history-list-container id="history" query-state="{{queryState_}}"
             query-result="[[queryResult_]]" grouped="[[grouped_]]"
-            path="history">
+            grouped-range="{{queryState_.range}}" path="history">
         </history-list-container>
         <template is="dom-if" if="[[syncedTabsSelected_(selectedPage_)]]">
           <history-synced-device-manager id="synced-devices"
               session-list="[[queryResult_.sessionList]]"
-              search-term=[[queryState_.searchTerm]]
+              search-term="[[queryState_.searchTerm]]"
+              sign-in-state="{{isUserSignedIn}}"

[tsergeant, 2016/08/15 07:05:17]

I don't think this is ever used? The value is always accessed as
`selectedPage.signInState` rather than `this.isUserSignedIn`

[calamity, 2016/08/17 03:15:28]

Wups. This is an artifact of something I was trying earlier. Removed.

               path="syncedTabs">
           </history-synced-device-manager>
         </template>
       </iron-pages>
     </div>
 
     <template is="dom-if" if="[[hasDrawer_]]">
       <app-drawer id="drawer" swipe-open align="start" tabindex="0">
         <div id="drawer-header">
           <h1>$i18n{title}</h1>
         </div>
         <history-side-bar id="drawer-side-bar" selected-page="[[selectedPage_]]"
             route="[[route_]]" show-footer="[[showSidebarFooter]]" drawer>
         </history-side-bar>
       </app-drawer>
     </template>
 
     <iron-media-query query="(max-width: 1023px)"
         query-matches="{{hasDrawer_}}">
     </iron-media-query>
   </template>
   <script src="chrome://history/app.js"></script>
 </dom-module>