Switch to standard integer types in crypto/.

crypto/random.cc

 // Copyright (c) 2012 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/random.h"
 
+#include <stddef.h>
+
 #include "base/rand_util.h"
 
 namespace crypto {
 
 void RandBytes(void *bytes, size_t length) {
   // It's OK to call base::RandBytes(), because it's already strongly random.
   // But _other_ code should go through this function to ensure that code which
   // needs secure randomness is easily discoverable.
   base::RandBytes(bytes, length);
 }
 
 }  // namespace crypto