Deprecate FileError in FileAPI

LayoutTests/fast/filesystem/resources/file-from-file-entry.js

 if (this.importScripts) {
     importScripts('fs-worker-common.js');
     importScripts('../../js/resources/js-test-pre.js');
     importScripts('fs-test-util.js');
 }
 
 description("Obtaining File from FileEntry.");
 
 var fileSystem = null;
 var testFileName = '/testFileEntry.txt';
 var testFileEntry = null;
 var testFile = null;
 
 function errorCallback(error) {
-    testFailed("Error occured:" + error.code);
+    testFailed("Error occured:" + error.name);
     finishJSTest();
 }
 
 function fileCallback(file) {
     testFile = file;
     shouldBe("testFile.name", "testFileEntry.name");
     shouldBe("testFile.type", "'text/plain'");
     shouldBe("testFile.size", "0");
     finishJSTest();
 }
 
 function getFileFromEntry(entry) {
     testFileEntry = entry;
     entry.file(fileCallback, errorCallback);
 }
 
 function createTestFile() {
     fileSystem.root.getFile(testFileName, {create:true}, getFileFromEntry, errorCallback);
 }
 
 function fileSystemCallback(fs) {
     fileSystem = fs;
     removeAllInDirectory(fileSystem.root, createTestFile, errorCallback);
 }
 
 var jsTestIsAsync = true;
 webkitRequestFileSystem(TEMPORARY, 100, fileSystemCallback, errorCallback);