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

chrome/browser/resources/md_history/app.html

Index: chrome/browser/resources/md_history/app.html
diff --git a/chrome/browser/resources/md_history/app.html b/chrome/browser/resources/md_history/app.html
index c39d309661aec01188895f4a8a6742b3ba4494a0..3edfe0f50a893aa346a7784cdfcf84153d7b730f 100644
--- a/chrome/browser/resources/md_history/app.html
+++ b/chrome/browser/resources/md_history/app.html
@@ -88,12 +88,13 @@
           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>