Move fast/js/resources files to resources.

LayoutTests/fast/filesystem/resources/file-writer-write-overlapped.js

 if (this.importScripts) {
     importScripts('fs-worker-common.js');
-    importScripts('../../js/resources/js-test-pre.js');
+    importScripts('../../../resources/js-test.js');
     importScripts('file-writer-utils.js');
 }
 
 description("Test using FileWriter.seek to write overlapping existing data in a file.");
 
 var fileEntry;
 var fileWriter;
 var testData = "Lorem ipsum";
 var seekBackwardOffset = -4;
 var seekForwardOffset = 4;
@@ skipping 50 matching lines @@
 // data for the test we want to run.  In the execution phase, we do a seek and a write, and the utility function that does those also validates that the data
 // actually got written.  So in the validation phase, we only have to check that the rest of the file didn't get corrupted while we were writing our bit.
 function runTest(fileEntryIn, fileWriterIn) {
     fileEntry = fileEntryIn;
     fileWriter = fileWriterIn;
     setFileContents(fileEntry, fileWriter, testData, testSeekBackward);
 }
 
 var jsTestIsAsync = true;
 setupAndRunTest(1024, 'file-writer-truncate-extend', runTest);