Switch to standard integer types in components/, part 2 of 4.

components/gcm_driver/crypto/gcm_crypto_test_helpers.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 "components/gcm_driver/crypto/gcm_crypto_test_helpers.h"
 
+#include <stddef.h>
+
 #include <sstream>
 #include <string>
 
 #include "base/base64url.h"
 #include "base/strings/string_util.h"
 #include "components/gcm_driver/common/gcm_messages.h"
 #include "components/gcm_driver/crypto/gcm_message_cryptographer.h"
 #include "components/gcm_driver/crypto/p256_key_util.h"
 #include "crypto/random.h"
 
@@ skipping 55 matching lines @@
   std::stringstream crypto_key_header;
   crypto_key_header << "dh=" << encoded_public_key;
 
   message->data["crypto_key"] = crypto_key_header.str();
 
   message->raw_data.swap(ciphertext);
   return true;
 }
 
 }  // namespace gcm