PPAPI: Add PluginPrivateFileSystem

ppapi/shared_impl/file_system_util.h

Index: ppapi/shared_impl/file_system_util.h
diff --git a/ppapi/shared_impl/file_system_util.h b/ppapi/shared_impl/file_system_util.h
new file mode 100644
index 0000000000000000000000000000000000000000..e65b2713efc2e46d07803334a88b63b3c41383d5
--- /dev/null
+++ b/ppapi/shared_impl/file_system_util.h
@@ -0,0 +1,20 @@
+// 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.
+
+#ifndef PPAPI_SHARED_IMPL_FILE_SYSTEM_UTIL_H_
+#define PPAPI_SHARED_IMPL_FILE_SYSTEM_UTIL_H_
+
+#include <string>
+
+#include "ppapi/c/private/ppb_isolated_file_system_private.h"
+#include "ppapi/shared_impl/ppapi_shared_export.h"
+
+namespace ppapi {
+
+PPAPI_SHARED_EXPORT std::string IsolatedFileSystemTypeToRootName(
+    PP_IsolatedFileSystemType_Private type);
+
+}  // namespace ppapi
+
+#endif  // PPAPI_SHARED_IMPL_FILE_SYSTEM_UTIL_H_