Switch to standard integer types in mojo/.

mojo/public/cpp/bindings/lib/map_internal.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.
 
 #ifndef MOJO_PUBLIC_CPP_BINDINGS_LIB_MAP_INTERNAL_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_MAP_INTERNAL_H_
 
+#include <stddef.h>
+
 #include <map>
 
 #include "mojo/public/cpp/bindings/array.h"
 #include "mojo/public/cpp/bindings/lib/template_util.h"
 
 namespace mojo {
 namespace internal {
 
 template <typename Key, typename Value, bool kValueIsMoveOnlyType>
 struct MapTraits {};
@@ skipping 193 matching lines @@
     dst->clear();
     for (auto it = src.begin(); it != src.end(); ++it)
       new ((*dst)[it->first].buf) Value(GetValue(it).Clone());
   }
 };
 
 }  // namespace internal
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_MAP_INTERNAL_H_