Convert garden-o-matic guts over to promises where appropriate

Tools/GardeningServer/scripts/garden-o-matic.js

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 60 matching lines @@
     var gtestIframe = document.querySelector('#chromium-gtests iframe');
     if (gtestIframe)
         gtestIframe.src = gtestIframe.src;
 
     // FIXME: This should be a button with a progress element.
     var numberOfTestsAnalyzed = 0;
     var updating = new ui.notifications.Info('Loading commit data ...');
 
     g_info.add(updating);
 
-    builders.buildersFailingNonLayoutTests(function(failuresList) {
+    builders.buildersFailingNonLayoutTests().then(function(failuresList) {
         g_nonLayoutTestFailureBuilders.update(failuresList);
         updatePartyTime();
     });
 
-    base.callInParallel([model.updateRecentCommits, model.updateResultsByBuilder], function() {
+    Promise.all([model.updateRecentCommits(), model.updateResultsByBuilder()]).then(function() {
         if (g_failuresController)
             g_failuresController.update();
 
         updating.update('Analyzing test failures ...');
 
         model.analyzeUnexpectedFailures(function(failureAnalysis) {
             updating.update('Analyzing test failures ... ' + ++numberOfTestsAnalyzed + ' tests analyzed.');
             g_unexpectedFailuresController.update(failureAnalysis);
-        }, function() {
+        }).then(function() {
             updatePartyTime();
             g_unexpectedFailuresController.purge();
 
             Object.keys(config.builders).forEach(function(builderName) {
                 if (!model.state.resultsByBuilder[builderName])
                     g_info.add(new ui.notifications.Info('Could not find test results for ' + builderName + ' in the last ' + config.kBuildNumberLimit + ' runs.'));
             });
 
             updating.dismiss();
 
@@ skipping 56 matching lines @@
     if (expected) {
         var failuresView = new ui.failures.List();
         g_failuresController = new controllers.ExpectedFailures(model.state, failuresView, onebarController);
         expected.appendChild(failuresView);
     }
 
     update();
 });
 
 })();