Use failure.tree field provided by the builder_alerts generator

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 = 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",
-      "https://build.chromium.org/p/chromium.chrome",
-      "https://build.chromium.org/p/chromium.chromiumos",
-      "https://build.chromium.org/p/chromium.gpu",
-      "https://build.chromium.org/p/chromium.linux",
-      "https://build.chromium.org/p/chromium.mac",
-      "https://build.chromium.org/p/chromium.memory",
-      "https://build.chromium.org/p/chromium.win"
-    ],
-  };
 }
 
 (function() {
 'use strict';
 
 // FIXME: This could potentially move onto CTSheriffFailureGroupData as it isn't relevant to
 // trooper failures.
 // Reverse sorting order, if a > b, return a negative number.
 CTFailures.prototype._failureByTreeListComparator = function(tree, a, b) {
   if (tree === undefined)
@@ skipping 28 matching lines @@
       return -1;
 
     if (a_list.last() != b_list.last())
       return b_list.last() - a_list.last();
   }
   return 0;
 };
 
 // Updates the format of the alerts array to be easier to parse.
 CTFailures.prototype._mungeAlerts = function(alerts) {
-  var masterToTree = {};
-  Object.keys(this._trees, function(tree, masters) {
-    masters.forEach(function(master) {
-      masterToTree[master] = tree;
-    });
-  });
-
   alerts.forEach(function(failure) {
     // FIXME: Have the server store the actual failure type in a different
     // field instead of smashing it into the reason.
     if (failure.failureType) {
       // The server has been fixed.
     } else {
       if (failure.reason) {
         var parts = failure.reason.split(':');
         failure.reason = parts[0];
         failure.failureType = parts[1] || 'FAIL';
       } else {
         failure.failureType = 'UNKNOWN';
       }
     }
-
-    // FIXME: Figure out what tree masters that aren't in masterToTree
-    // we should have.
-    failure.tree = masterToTree[failure.master_url];
   });
 };
 
 CTFailures.prototype.update = function() {
   var annotationPromise = CTFailureGroup.fetchAnnotations();
   return Promise.all([annotationPromise, net.json('http://sheriff-o-matic.appspot.com/alerts'),
       net.json('http://trooper-o-matic.appspot.com/alerts')]).then(function(data_array) {
     var annotations = data_array[0];
     var sheriff_data = data_array[1];
     var trooper_data = data_array[2];
@@ skipping 101 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>