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

Tools/GardeningServer/scripts/checkout_unittests.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 79 matching lines @@
             'testName': 'another/test.svg',
             'failureTypeList': ['IMAGE'],
         }, {
             'builderName': 'WebKit Mac10.6',
             'testName': 'another/test.svg',
             'failureTypeList': ['IMAGE', 'TEXT', 'IMAGE+TEXT'],
         }, {
             'builderName': 'Webkit Win7',
             'testName': 'fast/test.html',
             'failureTypeList': ['IMAGE+TEXT'],
-        }], function() {
-            ok(true);
-        }, function(failureInfo) {
+        }], function(failureInfo) {
             equals(failureInfo.testName, kExpectedTestNameProgressStack.pop());
         }, function() {
+            ok(false, 'There are no debug bots in the list');
+        }).catch().then(function() {
+            ok(true);
+        }, function() {
             ok(false, 'Checkout should be available.');
-        }, function() {
-            ok(false, 'There are no debug bots in the list');
         });
     }).then(function() {
 
         deepEqual(requests, [
             ["/rebaselineall",
              JSON.stringify({
                  "another/test.svg": {
                      "WebKit Linux": ["png"],
                      "WebKit Mac10.6": ["png","txt"]},
                  "fast/test.html": {
@@ skipping 13 matching lines @@
     simulator.ajax = function(options)
     {
         return Promise.resolve();
     };
 
     simulator.runTest(function() {
         checkout.rebaseline([{
             'builderName': 'WebKit Linux (dbg)',
             'testName': 'another/test.svg',
             'failureTypeList': ['IMAGE'],
-        }], function() {
-            ok(true);
-        }, function(failureInfo) {
+        }], function(failureInfo) {
             ok(false);
-        }, function() {
-            ok(false, 'Checkout should be available.');
         }, function(failureInfo) {
             ok(true);
+        }).then(function() {
+            ok(true);
+        }, function() {
+            ok(false);
         });
     }).then(start);
 });
 
 })();