[NaCl SDK] Add nacl_io and sdk_util namespaces.

native_client_sdk/src/libraries/nacl_io_test/mount_node_test.cc

 /* 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.
  */
 
 #include <errno.h>
 #include <fcntl.h>
 
 #include "nacl_io/error.h"
 #include "nacl_io/ioctl.h"
 #include "nacl_io/kernel_proxy.h"
 #include "nacl_io/mount_dev.h"
 #include "nacl_io/mount_node.h"
 #include "nacl_io/mount_node_dir.h"
 #include "nacl_io/mount_node_mem.h"
 #include "nacl_io/osdirent.h"
 
 #include "gtest/gtest.h"
 
 #define NULL_NODE ((MountNode*) NULL)
 
+using namespace nacl_io;
+
 static int s_AllocNum = 0;
 
 class MockMemory : public MountNodeMem {
  public:
   MockMemory() : MountNodeMem(NULL) { s_AllocNum++; }
 
   ~MockMemory() { s_AllocNum--; }
 
   Error Init(int mode) { return MountNodeMem::Init(mode); }
   Error AddChild(const std::string& name, const ScopedMountNode& node) {
@@ skipping 155 matching lines @@
   EXPECT_EQ(1, file->GetLinks());
   EXPECT_EQ(2, file->RefCount());
   EXPECT_EQ(0, root->RemoveChild("F2"));
   EXPECT_EQ(0, file->GetLinks());
   EXPECT_EQ(1, file->RefCount());
   EXPECT_EQ(2, s_AllocNum);
 
   file.reset();
   EXPECT_EQ(1, s_AllocNum);
 }