Deprecate FileError in FileAPI

LayoutTests/fast/filesystem/script-tests/filesystem-reference.js

 description("This tests if Entries returned by callbacks keep functioning even after we lose a reference to the filesystem in the script.");
 
 var testDirectory = null;
 var testEntries = null;
 
 function errorCallback(error)
 {
-    testFailed("Error occurred: " + error.code);
+    testFailed("Error occurred: " + error.name);
     finishJSTest();
 }
 
 function runTest1(root)
 {
     debug("Running runTest1()...");
     var helper = new JoinHelper();
     var done = function() { helper.done(); };
 
     helper.run(function() { root.getFile('a', {create:true}, done, errorCallback); });
@@ skipping 42 matching lines @@
     removeAllInDirectory(fs.root, function() { runTest1(root); }, errorCallback);
     fs = null;
     gc();
 }
 
 if (window.webkitRequestFileSystem) {
     window.jsTestIsAsync = true;
     webkitRequestFileSystem(window.TEMPORARY, 100, fileSystemCallback, errorCallback);
 } else
     debug("This test requires FileSystem API support.");