Switch to standard integer types in crypto/.

crypto/curve25519_openssl.cc

 // Copyright 2015 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 "crypto/curve25519.h"
 
 #include <openssl/curve25519.h>
+#include <stdint.h>
 
 namespace crypto {
 
 namespace curve25519 {
 
 bool ScalarMult(const uint8_t* private_key,
                 const uint8_t* peer_public_key,
                 uint8_t* shared_key) {
   return !!X25519(shared_key, private_key, peer_public_key);
 }
 
 void ScalarBaseMult(const uint8_t* private_key, uint8_t* public_key) {
   X25519_public_from_private(public_key, private_key);
 }
 
 }  // namespace curve25519
 
 }  // namespace crypto