[MD History] Copy stats from the old history page.

chrome/browser/resources/md_history/grouped_list.js

Index: chrome/browser/resources/md_history/grouped_list.js
diff --git a/chrome/browser/resources/md_history/grouped_list.js b/chrome/browser/resources/md_history/grouped_list.js
index f5ca7d0ca8faa65b68e28cd567ef2eafd37b6da4..e3fc5d30c7d1d637e03c1fd49c731b023d721913 100644
--- a/chrome/browser/resources/md_history/grouped_list.js
+++ b/chrome/browser/resources/md_history/grouped_list.js
@@ -126,6 +126,19 @@ Polymer({
         domains: this.createHistoryDomains_(this.historyData)
       }];
     }
+
+    this.addItemIndexes();
+  },
+
+  addItemIndexes: function() {
+    var index = 0;
+    this.groupedHistoryData_.forEach(function(group) {
+      group.domains.forEach(function(domain) {
+        domain.visits.forEach(function(visit) {
+          visit.index = index++;
+        });
+      });
+    });
   },
 
   /**