Move GardeningServer out of BuildSlaveSupport

Tools/GardeningServer/scripts/LayoutTestResultsLoader.js

 /*
  * Copyright (C) 2011 Apple 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 125 matching lines @@
                 return;
             }
 
             // Find out which tests failed.
             fetchAndParseResultsHTML(function() {
                 successCallback(result);
             }, errorCallback);
         }, errorCallback);
     },
 };