diff -r 000000000000 -r 6474c204b198 security/sandbox/chromium/base/platform_file.cc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/security/sandbox/chromium/base/platform_file.cc	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,31 @@
+// Copyright (c) 2011 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 "base/platform_file.h"
+
+namespace base {
+
+PlatformFileInfo::PlatformFileInfo()
+    : size(0),
+      is_directory(false),
+      is_symbolic_link(false) {
+}
+
+PlatformFileInfo::~PlatformFileInfo() {}
+
+#if !defined(OS_NACL)
+PlatformFile CreatePlatformFile(const FilePath& name,
+                                int flags,
+                                bool* created,
+                                PlatformFileError* error) {
+  if (name.ReferencesParent()) {
+    if (error)
+      *error = PLATFORM_FILE_ERROR_ACCESS_DENIED;
+    return kInvalidPlatformFileValue;
+  }
+  return CreatePlatformFileUnsafe(name, flags, created, error);
+}
+#endif
+
+}  // namespace base