Fix partytime.

Tools/GardeningServer/model/ct-failures.html

 <!--
 Copyright 2014 The Chromium Authors. All rights reserved.
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file.
 -->
 
 <link rel="import" href="../lib/net.html">
 <link rel="import" href="../lib/update-util.html">
 <link rel="import" href="ct-builder-revisions.html">
 <link rel="import" href="ct-failure.html">
 <link rel="import" href="ct-failure-group.html">
 <link rel="import" href="ct-sheriff-failure-group-data.html">
 <link rel="import" href="ct-trooper-failure-group-data.html">
 <link rel="import" href="ct-commit-list.html">
 
 <script>
 function CTFailures(commitLog) {
   this.commitLog = commitLog;
   this.builderLatestRevisions = null;
   // Maps a tree id to an array of CTFailureGroups within that tree.
-  this.failures = {};
+  this.failures = null;
   this.lastUpdateDate = null;
 
   // FIXME: Get this from
   // https://chromium.googlesource.com/chromium/tools/build/+/master/scripts/slave/gatekeeper_trees.json?format=text.
   this._trees = {
     blink: [
       "https://build.chromium.org/p/chromium.webkit",
     ],
     chromium: [
       "https://build.chromium.org/p/chromium",
@@ skipping 193 matching lines @@
 
     if (!newFailures[tree])
       newFailures[tree] = [];
     var commitList = new CTCommitList(this.commitLog, rangeGroup.likely_revisions);
     newFailures[tree].push(new CTFailureGroup(rangeGroup.sort_key, new CTSheriffFailureGroupData(treeFailures, commitList)));
   }.bind(this));
 };
 
 })();
 </script>