Add FIDO U2F message and packet classes

device/u2f/u2f_message_fuzzer.cc

+// Copyright 2016 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 <stddef.h>
+#include <stdint.h>
+#include "u2f_message.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  scoped_refptr<net::IOBufferWithSize> buf =
+      make_scoped_refptr(new net::IOBufferWithSize(size));

[Reilly Grant (use Gerrit), 2016/12/10 00:02:44]

scoped_refptr<net::IOBufferWithSize> buf(
    new net::IOBufferWithSize(size);

(To avoid the need for make_scoped_refptr.)

[Casey Piper, 2016/12/10 01:38:03]

Done.

+  memcpy(buf->data(), data, size);
+  scoped_refptr<device::U2fMessage> msg =
+      device::U2fMessage::CreateFromSerializedData(buf);
+  return 0;
+}