Manual refactor of few more stragglers to enum-based WaitableEvent constructor.

tools/ipc_fuzzer/message_replay/replay_process.cc

Index: tools/ipc_fuzzer/message_replay/replay_process.cc
diff --git a/tools/ipc_fuzzer/message_replay/replay_process.cc b/tools/ipc_fuzzer/message_replay/replay_process.cc
index dcee5c77d598463785bbe5a6650930b1eaa9d338..58ba44379c018c512043b788330bdd900063ca65 100644
--- a/tools/ipc_fuzzer/message_replay/replay_process.cc
+++ b/tools/ipc_fuzzer/message_replay/replay_process.cc
@@ -49,9 +49,9 @@ void InitializeMojoIPCChannel() {
 
 ReplayProcess::ReplayProcess()
     : io_thread_("Chrome_ChildIOThread"),
-      shutdown_event_(true, false),
-      message_index_(0) {
-}
+      shutdown_event_(base::WaitableEvent::ResetPolicy::MANUAL,
+                      base::WaitableEvent::InitialState::NOT_SIGNALED),
+      message_index_(0) {}
 
 ReplayProcess::~ReplayProcess() {
   channel_.reset();