[NaCl SDK] nacl_io: Fix utime() on directories.

native_client_sdk/src/libraries/nacl_io/memfs/mem_fs.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "nacl_io/memfs/mem_fs.h"
 
 #include <errno.h>
 #include <fcntl.h>
 
 #include <string>
@@ skipping 87 matching lines @@
       return error;
     node->SetMode(mode);
 
     error = parent->AddChild(path.Basename(), node);
     if (error)
       return error;
 
   } else {
     // Opening an existing file.
 
-    // Directories can only be opened read-only.
-    if (node->IsaDir() && (open_flags & 3) != O_RDONLY)
-      return EISDIR;
-
     // If we were expected to create it exclusively, fail
     if (open_flags & O_EXCL)
       return EEXIST;
 
     if (open_flags & O_TRUNC)
       node->FTruncate(0);
   }
 
   *out_node = node;
   return 0;
@@ skipping 145 matching lines @@
   if (file_only && child->IsaDir())
     return EISDIR;
 
   if (remove_dir && child->ChildCount() > 0)
     return ENOTEMPTY;
 
   return parent->RemoveChild(path.Basename());
 }
 
 }  // namespace nacl_io