[NaCl SDK] Add nacl_io and sdk_util namespaces.

native_client_sdk/src/libraries/nacl_io_test/mount_test.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.
  */
 
 #include <errno.h>
 #include <fcntl.h>
 #include <string.h>
 #include <sys/stat.h>
 #include <string>
 
 #include "gtest/gtest.h"
 #include "nacl_io/ioctl.h"
 #include "nacl_io/mount.h"
 #include "nacl_io/mount_dev.h"
 #include "nacl_io/mount_mem.h"
 #include "nacl_io/osdirent.h"
 #include "nacl_io/osunistd.h"
 
+using namespace nacl_io;
+
 namespace {
 
 class MountMemMock : public MountMem {
  public:
   MountMemMock() {
     StringMap_t map;
     EXPECT_EQ(0, Init(1, map, NULL));
   }
 
   int num_nodes() { return (int) inode_pool_.size(); }
@@ skipping 328 matching lines @@
                        100 - content.size()));
 
   // Now we try to send something with an invalid prefix
   std::string bogus_message("Woah there, this message has no valid prefix");
   struct tioc_nacl_input_string bogus_pack;
   bogus_pack.length = bogus_message.size();
   bogus_pack.buffer = bogus_message.data();
   EXPECT_EQ(ENOTTY, dev_tty->Ioctl(TIOCNACLINPUT,
                                    reinterpret_cast<char*>(&bogus_pack)));
 }