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

components/gcm_driver/crypto/gcm_message_cryptographer.h

 // 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.
 
 #ifndef COMPONENTS_GCM_DRIVER_CRYPTO_GCM_MESSAGE_CRYPTOGRAPHER_H_
 #define COMPONENTS_GCM_DRIVER_CRYPTO_GCM_MESSAGE_CRYPTOGRAPHER_H_
 
+#include <stddef.h>
 #include <stdint.h>
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/strings/string_piece.h"
 
 namespace gcm {
 
 // Messages delivered through GCM may be encrypted according to the IETF Web
@@ skipping 98 matching lines @@
   bool allow_empty_auth_secret_for_tests_ = false;
 
   void set_allow_empty_auth_secret_for_tests(bool value) {
     allow_empty_auth_secret_for_tests_ = value;
   }
 };
 
 }  // namespace gcm
 
 #endif  // COMPONENTS_GCM_DRIVER_CRYPTO_GCM_MESSAGE_CRYPTOGRAPHER_H_