[NaCl SDK] Add nacl_io and sdk_util namespaces.

native_client_sdk/src/libraries/nacl_io/mount_dev.cc

 /* Copyright (c) 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.
  */
 #if defined(WIN32)
 #define _CRT_RAND_S
 #endif
 
 #include <errno.h>
 #include <fcntl.h>
@@ skipping 10 matching lines @@
 #include "nacl_io/osunistd.h"
 #include "nacl_io/pepper_interface.h"
 #include "sdk_util/auto_lock.h"
 
 #if defined(__native_client__)
 #include <irt.h>
 #elif defined(WIN32)
 #include <stdlib.h>
 #endif
 
+namespace nacl_io {
+
 namespace {
 
 class RealNode : public MountNode {
  public:
   RealNode(Mount* mount, int fd);
 
   virtual Error Read(size_t offs, void* buf, size_t count, int* out_bytes);
   virtual Error Write(size_t offs,
                       const void* buf,
                       size_t count,
@@ skipping 365 matching lines @@
   INITIALIZE_DEV_NODE_1("/console2", ConsoleNode, PP_LOGLEVEL_WARNING);
   INITIALIZE_DEV_NODE_1("/console3", ConsoleNode, PP_LOGLEVEL_ERROR);
   INITIALIZE_DEV_NODE("/tty", TtyNode);
   INITIALIZE_DEV_NODE_1("/stdin", RealNode, 0);
   INITIALIZE_DEV_NODE_1("/stdout", RealNode, 1);
   INITIALIZE_DEV_NODE_1("/stderr", RealNode, 2);
 
   return 0;
 }
 
+}  // namespace nacl_io
+