[Sheriff-o-matic] Use likely_revisions instead of first_failing/last_passing

Tools/GardeningServer/model/ct-failure-group.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="ct-commit-list.html">
 
 <script>
-function CTFailureGroup(key, failures, annotation) {
+function CTFailureGroup(key, failures, revisions, annotation) {
   this.key = key;
   this.failures = failures;
+  this.revisions = revisions.slice();
   this._annotation = annotation || {};
   this._computeProperties();
 }
 
 CTFailureGroup.prototype.snoozeUntil = function(time) {
   return this._annotate({
     snoozeTime: time,
   });
 };
 
 CTFailureGroup.prototype.unsnooze = function() {
   return this._annotate({
     snoozeTime: undefined,
   });
 };
 
 CTFailureGroup.prototype.commitList = function(commits) {
-  return new CTCommitList(this, commits);
+  return new CTCommitList(commits, this.revisions);
 };
 
 CTFailureGroup.prototype.setBug = function(bug) {
   if (/^[0-9]+$/.test(bug))
     bug = 'http://crbug.com/' + bug;
   return this._annotate({
     bug: bug,
   });
 };
 
@@ skipping 45 matching lines @@
   }.bind(this));
 };
 
 CTFailureGroup.fetchAnnotations = function() {
   // FIXME: Fetch annotations from frontend.
   var stored = localStorage.CTFailureGroupAnnotations;
   var annotations = stored ? JSON.parse(stored) : {};
   return Promise.resolve(annotations);
 };
 </script>