Switch to standard integer types in mojo/.

mojo/public/cpp/system/macros.h

 // 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.
 
 // Define a set of C++ specific macros.
 // Mojo C++ API users can assume that mojo/public/cpp/system/macros.h
 // includes mojo/public/c/system/macros.h.
 
 #ifndef MOJO_PUBLIC_CPP_SYSTEM_MACROS_H_
 #define MOJO_PUBLIC_CPP_SYSTEM_MACROS_H_
 
+#include <stddef.h>
+
 #include "mojo/public/c/system/macros.h"  // Symbols exposed.
 
 // A macro to disallow the copy constructor and operator= functions.
 #define MOJO_DISALLOW_COPY_AND_ASSIGN(TypeName) \
   TypeName(const TypeName&) = delete;           \
   void operator=(const TypeName&) = delete
 
 // Used to calculate the number of elements in an array.
 // (See |arraysize()| in Chromium's base/macros.h for more details.)
 namespace mojo {
@@ skipping 50 matching lines @@
 // Used to explicitly mark the return value of a function as unused. (You this
 // if you are really sure you don't want to do anything with the return value of
 // a function marked with |MOJO_WARN_UNUSED_RESULT|.
 template <typename T>
 inline void ignore_result(const T&) {
 }
 
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_SYSTEM_MACROS_H_