Fix bug in Directory after porting to using native ports

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 35 matching lines @@
                       DirectoryListing* listing) {
   if (strcmp(dir_name, ".") != 0 &&
       strcmp(dir_name, "..") != 0) {
     size_t written = snprintf(path + path_length,
                               MAX_PATH - path_length,
                               "%s",
                               dir_name);
     if (written != strlen(dir_name)) {
       return false;
     }
-    bool ok = listing->HandleDirectory(dir_name);
+    bool ok = listing->HandleDirectory(path);
     if (!ok) return ok;
     if (recursive) {
       return ListRecursively(path, recursive, listing);
     }
   }
   return true;
 }
 
 
 static bool HandleFile(char* file_name,
@@ skipping 328 matching lines @@
 }
 
 
 bool Directory::Delete(const char* dir_name, bool recursive) {
   if (!recursive) {
     return (RemoveDirectory(dir_name) != 0);
   } else {
     return DeleteRecursively(dir_name);
   }
 }