[WIP] Provided file system from NACL.

chrome/browser/chromeos/file_system_provider/provided_file_system_defs.h

+// Copyright 2012 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 CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_PROVIDED_FILE_SYSTEM_DEFS_H_
+#define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_PROVIDED_FILE_SYSTEM_DEFS_H_
+
+namespace extensions {
+class EventRouter;
+}  // namespace extensions
+
+// source types for the provided file systems
+namespace chromeos {
+
+class PluginEventRouter;
+
+namespace file_system_provider {
+
+typedef enum Source_Type { extension = 0, plugin } Source_Type;
+
+// Define traits for fs providers sources
+// Extension or general type
+template <int n = Source_Type::extension>
+struct Source_Traits {
+  typedef extensions::EventRouter EventRouterType;
+};
+
+// Plugin filesystem
+template <>
+struct Source_Traits<Source_Type::plugin> {
+  typedef chromeos::PluginEventRouter EventRouterType;
+};
+
+}  // namespace file_system_provider
+}  // namespace chromeos
+#endif  // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_PROVIDED_FILE_SYSTEM_DEFS_H_