Fix bug from r4390 on Windows

runtime/bin/directory_win.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "bin/directory.h"
 
 #include <errno.h>
 #include <sys/stat.h>
 
 #include "bin/platform.h"
@@ skipping 56 matching lines @@
                        char* path,
                        int path_length,
                        DirectoryListing* listing) {
   size_t written = snprintf(path + path_length,
                             MAX_PATH - path_length,
                             "%s",
                             file_name);
   if (written != strlen(file_name)) {
     return false;
   };
-  return listing->HandleFile(file_name);
+  return listing->HandleFile(path);
 }
 
 
 static bool HandleEntry(LPWIN32_FIND_DATA find_file_data,
                         char* path,
                         int path_length,
                         bool recursive,
                         DirectoryListing* listing) {
   DWORD attributes = find_file_data->dwFileAttributes;
   if ((attributes & FILE_ATTRIBUTE_DIRECTORY) != 0) {
@@ skipping 307 matching lines @@
 }
 
 
 bool Directory::Delete(const char* dir_name, bool recursive) {
   if (!recursive) {
     return (RemoveDirectory(dir_name) != 0);
   } else {
     return DeleteRecursively(dir_name);
   }
 }