Added script to generate stats on a git checkout

infra/tools/antibody/static/tbr_by_user.js

 $(document).ready(function(){
   $(".username").keypress(function(e){
     if (e.keyCode == 13) {
       var user = $(".username").val();
       $('.tbr').empty();
       get_commits_tbred_to_user(user);
     }
   });
 
   function get_commits_tbred_to_user(user) {
     $.getJSON("./tbr_by_user.json", function(data) {
+      console.log(data);
+      console.log('hello');
       var commits_tbred_to_user = data["by_user"][user];
       if (commits_tbred_to_user === undefined) {
         $('.tbr').append($('<h3>').text(
             `No commits to be reviewed by ${user}`));
       } else {
         gitiles_prefix = data["gitiles_prefix"];
         $('.tbr').append($('<h3>').text(`Commits to be reviewed by ${user}`));
         $('.tbr').append(document.createElement('br'));
         var table = $('<table>').attr('data-toggle', 'table').attr(
           'data-cache', 'false');
         table.append($('<thead>').append($('<tr>').append(
-            $('<th>').attr('data-field', 'git_hash label').text('git_hash'),
+            $('<th>').attr('data-field', 'subject label').text('Git Commit Subject'),
             $('<th>').attr('data-field', 'rietveld_url label').text(
-                'rietveld_url'),
+                'Review URL'),
             $('<th>').attr('data-field', 'request_timestamp').text(
-                'request_timestamp')
+                'Request Timestamp')
           )));
         var tbody = $('<tbody>');
         for (var i = 0; i < commits_tbred_to_user.length; i++) {
           data_item = commits_tbred_to_user[i];
+          console.log(data_item);
           tbody.append($('<tr>').addClass('data_item').append(
-              $('<td>').addClass('git_hash hyperlink').append(
-                $('<a>').attr('href', `${gitiles_prefix}${data_item[0]}`).text(
+              $('<td>').addClass('subject hyperlink').append(
+                $('<a>').attr('href', `${gitiles_prefix}${data_item[3]}`).text(
                   `${data_item[0]}`)),
               $('<td>').addClass('rietveld_url hyperlink').append(
                 $('<a>').attr('href', `${data_item[1]}`).text(
                   `${data_item[1]}`)),
               $('<td>').addClass('request_timestamp').text(`${data_item[2]}`)
             ));
         }
         table.append(tbody);
         $('.tbr').append(table);
       }
     });
   }
 });