[NaCl SDK] Additional fix for r207878: Add dummy unistd.h for Windows.

native_client_sdk/src/libraries/nacl_io_test/mount_html5fs_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 <string.h>
 #include <gmock/gmock.h>
 #include <ppapi/c/ppb_file_io.h>
 #include <ppapi/c/pp_directory_entry.h>
 #include <ppapi/c/pp_errors.h>
 #include <ppapi/c/pp_instance.h>
 #if defined(WIN32)
 #include <windows.h>  // For Sleep()
 #endif
 
 #include "mock_util.h"
 #include "nacl_io/mount_html5fs.h"
 #include "nacl_io/osdirent.h"
+#include "nacl_io/osunistd.h"
 #include "pepper_interface_mock.h"
 
 using ::testing::_;
 using ::testing::DoAll;
 using ::testing::Invoke;
 using ::testing::Return;
 using ::testing::SaveArg;
 using ::testing::SetArgPointee;
 using ::testing::StrEq;
 using ::testing::WithArgs;
@@ skipping 591 matching lines @@
   ASSERT_EQ(sizeof(dirent) * 2, result_bytes);
   EXPECT_LT(0, dirents[0].d_ino);  // 0 is an invalid inode number.
   EXPECT_EQ(sizeof(dirent), dirents[0].d_off);
   EXPECT_EQ(sizeof(dirent), dirents[0].d_reclen);
   EXPECT_STREQ(fileref_name_cstr_1, dirents[0].d_name);
   EXPECT_LT(0, dirents[1].d_ino);  // 0 is an invalid inode number.
   EXPECT_EQ(sizeof(dirent), dirents[1].d_off);
   EXPECT_EQ(sizeof(dirent), dirents[1].d_reclen);
   EXPECT_STREQ(fileref_name_cstr_2, dirents[1].d_name);
 }