Restructure the ipc_fuzzer directory.

tools/ipc_fuzzer/replay/replay.cc

-// Copyright 2013 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 <stdlib.h>
-
-#include "base/at_exit.h"
-#include "tools/ipc_fuzzer/replay/replay_process.h"
-
-int main(int argc, const char** argv) {
-  base::AtExitManager exit_manager;
-  ipc_fuzzer::ReplayProcess replay;
-  if (!replay.Initialize(argc, argv))
-    return EXIT_FAILURE;
-
-  replay.OpenChannel();
-
-  if (!replay.OpenTestcase())
-    return EXIT_FAILURE;
-
-  replay.Run();
-  return EXIT_SUCCESS;
-}