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

chrome/browser/resources/md_history/side_bar.js

Index: chrome/browser/resources/md_history/side_bar.js
diff --git a/chrome/browser/resources/md_history/side_bar.js b/chrome/browser/resources/md_history/side_bar.js
index 77272c8ece1960b4759b188ee296a451a5a48fc9..9065eb2a5f762cca1045186cd5600e5f7c2f4319 100644
--- a/chrome/browser/resources/md_history/side_bar.js
+++ b/chrome/browser/resources/md_history/side_bar.js
@@ -9,6 +9,9 @@ Polymer({
     selectedPage: {
       type: String,
       notify: true
+    },
+    routeData: {
+      type: Object
     }
   },
 
@@ -20,6 +23,7 @@ Polymer({
   onSelect_: function(e) {
     this.fire('unselect-all');
     this.selectedPage = e.detail.item.getAttribute('view-id');
+    this.set('routeData.page', e.detail.item.getAttribute('path'));
   },
 
   /**