Switch to standard integer types in mojo/.

mojo/edk/embedder/simple_platform_shared_buffer_posix.cc

 // Copyright 2014 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 "mojo/edk/embedder/simple_platform_shared_buffer.h"
 
+#include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>     // For |fileno()|.
 #include <sys/mman.h>  // For |mmap()|/|munmap()|.
 #include <sys/stat.h>
 #include <sys/types.h>  // For |off_t|.
 #include <unistd.h>
 #include <limits>
 #include <utility>
 
 #include "base/files/file_path.h"
@@ skipping 132 matching lines @@
 
 // SimplePlatformSharedBufferMapping -------------------------------------------
 
 void SimplePlatformSharedBufferMapping::Unmap() {
   int result = munmap(real_base_, real_length_);
   PLOG_IF(ERROR, result != 0) << "munmap";
 }
 
 }  // namespace edk
 }  // namespace mojo