[NaCl SDK] Enable linux host build for nacl_io and nacl_io_tests.

native_client_sdk/src/libraries/nacl_io/kernel_wrap_win.cc

Index: native_client_sdk/src/libraries/nacl_io/kernel_wrap_win.cc
diff --git a/native_client_sdk/src/libraries/nacl_io/kernel_wrap_win.cc b/native_client_sdk/src/libraries/nacl_io/kernel_wrap_win.cc
index c5dcc02679b45df130699449d6c71b2c6c06710c..cf35f96987500560eebec806e3a66c327bd57523 100644
--- a/native_client_sdk/src/libraries/nacl_io/kernel_wrap_win.cc
+++ b/native_client_sdk/src/libraries/nacl_io/kernel_wrap_win.cc
@@ -215,74 +215,6 @@ int _write(int fd, const void* buf, size_t nbyte) {
   return ki_write(fd, buf, nbyte);
 }
 
-
-// "real" functions, i.e. the unwrapped original functions. On Windows we don't
-// wrap, so the real functions aren't accessible. In most cases, we just fail.
-
-int _real_close(int fd) {
-  return ENOSYS;
-}
-
-int _real_fstat(int fd, struct stat *buf) {
-  return 0;
-}
-
-int _real_getdents(int fd, void* nacl_buf, size_t nacl_count, size_t *nread) {
-  return ENOSYS;
-}
-
-int _real_lseek(int fd, off_t offset, int whence, off_t* new_offset) {
-  return ENOSYS;
-}
-
-int _real_mkdir(const char* pathname, mode_t mode) {
-  return ENOSYS;
-}
-
-int _real_mmap(void** addr, size_t length, int prot, int flags, int fd,
-               off_t offset) {
-  return ENOSYS;
-}
-
-int _real_munmap(void* addr, size_t length) {
-  return ENOSYS;
-}
-
-int _real_open(const char* pathname, int oflag, mode_t cmode, int* newfd) {
-  return ENOSYS;
-}
-
-int _real_open_resource(const char* file, int* fd) {
-  return ENOSYS;
-}
-
-int _real_read(int fd, void *buf, size_t count, size_t *nread) {
-  *nread = count;
-  return 0;
-}
-
-int _real_rmdir(const char* pathname) {
-  return ENOSYS;
-}
-
-int _real_write(int fd, const void *buf, size_t count, size_t *nwrote) {
-  *nwrote = count;
-  return 0;
-}
-
-#define USECS_FROM_WIN_TO_TO_UNIX_EPOCH 11644473600000LL
-uint64_t usec_since_epoch() {
-  FILETIME ft;
-  ULARGE_INTEGER ularge;
-  GetSystemTimeAsFileTime(&ft);
-
-  ularge.LowPart = ft.dwLowDateTime;
-  ularge.HighPart = ft.dwHighDateTime;
-
-  // Truncate to usec resolution.
-  return ularge.QuadPart / 10;
-}
-
 // Do nothing for Windows, we replace the library at link time.
 void kernel_wrap_init() {
 }