Cleanup: Introduce AsyncFileTestHelper for testing with async file/quota operations

webkit/fileapi/local_file_system_test_helper.h

Index: webkit/fileapi/local_file_system_test_helper.h
diff --git a/webkit/fileapi/local_file_system_test_helper.h b/webkit/fileapi/local_file_system_test_helper.h
index 6dbebc68882e7cf8a24ef3b918dac187d7d93191..f3f20f33d1868aef26fa35e7dec5157e3726d91b 100644
--- a/webkit/fileapi/local_file_system_test_helper.h
+++ b/webkit/fileapi/local_file_system_test_helper.h
@@ -62,16 +62,6 @@ class LocalFileSystemTestOriginHelper {
     return CreateURL(base::FilePath::FromUTF8Unsafe(utf8));
   }
 
-  // Helper methods for same-FileUtil copy/move.
-  base::PlatformFileError SameFileUtilCopy(
-      FileSystemOperationContext* context,
-      const FileSystemURL& src,
-      const FileSystemURL& dest) const;
-  base::PlatformFileError SameFileUtilMove(
-      FileSystemOperationContext* context,
-      const FileSystemURL& src,
-      const FileSystemURL& dest) const;
-
   // This returns cached usage size returned by QuotaUtil.
   int64 GetCachedOriginUsage() const;