[NaCl SDK] Add nacl_io and sdk_util namespaces.

native_client_sdk/src/libraries/nacl_io/mount.h

 /* Copyright (c) 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 LIBRARIES_NACL_IO_MOUNT_H_
 #define LIBRARIES_NACL_IO_MOUNT_H_
 
 #include <map>
 #include <string>
 
 #include "nacl_io/error.h"
 #include "nacl_io/inode_pool.h"
 #include "nacl_io/mount_node.h"
 #include "nacl_io/path.h"
 
 #include "sdk_util/macros.h"
 #include "sdk_util/ref_object.h"
 #include "sdk_util/scoped_ref.h"
 
+namespace nacl_io {
+
 class Mount;
 class MountNode;
 class PepperInterface;
 
-typedef ScopedRef<Mount> ScopedMount;
+typedef sdk_util::ScopedRef<Mount> ScopedMount;
 typedef std::map<std::string, std::string> StringMap_t;
 
 // NOTE: The KernelProxy is the only class that should be setting errno. All
 // other classes should return Error (as defined by nacl_io/error.h).
-class Mount : public RefObject {
+class Mount : public sdk_util::RefObject {
  protected:
   // The protected functions are only used internally and will not
   // acquire or release the mount's lock.
   Mount();
   virtual ~Mount();
 
   // Init must be called by the factory before the mount is used.
   // This function must assign a root node, or replace FindNode.
   // |ppapi| can be NULL. If so, this mount cannot make any pepper calls.
   virtual Error Init(int dev, StringMap_t& args, PepperInterface* ppapi);
@@ skipping 43 matching lines @@
   INodePool inode_pool_;
 
  private:
   // May only be called by the KernelProxy when the Kernel's
   // lock is held, so we make it private.
   friend class KernelObject;
   friend class KernelProxy;
   DISALLOW_COPY_AND_ASSIGN(Mount);
 };
 
+}  // namespace nacl_io
+
 #endif  // LIBRARIES_NACL_IO_MOUNT_H_