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

native_client_sdk/src/libraries/nacl_io/mount_node_http.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 "nacl_io/mount_node_http.h"
 
 #include <assert.h>
 #include <errno.h>
 #include <stdio.h>
 #include <string.h>
@@ skipping 83 matching lines @@
 bool ParseContentRange(const StringMap_t& headers,
                        size_t* read_start,
                        size_t* read_end,
                        size_t* entity_length) {
   StringMap_t::const_iterator iter = headers.find("Content-Range");
   if (iter == headers.end())
     return false;
 
   // The key should look like "bytes ##-##/##" or "bytes ##-##/*". The last
   // value is the entity length, which can potentially be * (i.e. unknown).
-  int read_start_int;
-  int read_end_int;
-  int entity_length_int;
+  size_t read_start_int;
+  size_t read_end_int;
+  size_t entity_length_int;
   int result = sscanf(iter->second.c_str(),
                       "bytes %" SCNuS "-%" SCNuS "/%" SCNuS,
                       &read_start_int,
                       &read_end_int,
                       &entity_length_int);
 
   // The Content-Range header specifies an inclusive range: e.g. the first ten
   // bytes is "bytes 0-9/*". Convert it to a half-open range by incrementing
   // read_end.
   if (result == 2) {
@@ skipping 425 matching lines @@
     bytes_to_read -= bytes_read;
     out_buffer += bytes_read;
   }
 
   *out_bytes = count;
   return 0;
 }
 
 }  // namespace nacl_io