Temporary fix for flakiness dashboard by avoiding loading mac snow leopard test expectation file fr…

Tools/TestResultServer/static-dashboards/flakiness_dashboard.js

 // Copyright (C) 2012 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:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
@@ skipping 52 matching lines @@
                 expectationsDirectory: 'mac',
                 subPlatforms: {
                     'LION': {
                         expectationsDirectory: 'mac-lion',
                         subPlatforms: {
                             'WK1': { fallbackPlatforms: ['APPLE_MAC_LION', 'APPLE_MAC'] },
                             'WK2': { fallbackPlatforms: ['APPLE_MAC_LION', 'APPLE_MAC', 'WK2'] }
                         }
                     },
                     'SNOWLEOPARD': {
-                        expectationsDirectory: 'mac-snowleopard',
+                        expectationsDirectory: null,
                         subPlatforms: {
                             'WK1': { fallbackPlatforms: ['APPLE_MAC_SNOWLEOPARD', 'APPLE_MAC'] },
                             'WK2': { fallbackPlatforms: ['APPLE_MAC_SNOWLEOPARD', 'APPLE_MAC', 'WK2'] }
                         }
                     }
                 }
             },
             'WIN': {
                 expectationsDirectory: 'win',
                 subPlatforms: {
@@ skipping 2441 matching lines @@
         // escape key
         hideLegend();
         ui.popup.hide();
     }
 }, false);
 
 window.addEventListener('load', function() {
     resourceLoader = new loader.Loader();
     resourceLoader.load();
 }, false);