clang-tidy WaitableEvent refactor (Android side)

mojo/message_pump/message_pump_mojo.cc

Index: mojo/message_pump/message_pump_mojo.cc
diff --git a/mojo/message_pump/message_pump_mojo.cc b/mojo/message_pump/message_pump_mojo.cc
index bbf8ce3afe96e42919c2263361a7a3f722170933..b907ba3e2c0ceac00400dc9fe707072c7aac23af 100644
--- a/mojo/message_pump/message_pump_mojo.cc
+++ b/mojo/message_pump/message_pump_mojo.cc
@@ -50,7 +50,10 @@ struct MessagePumpMojo::RunState {
 };
 
 MessagePumpMojo::MessagePumpMojo()
-    : run_state_(NULL), next_handler_id_(0), event_(false, false) {
+    : run_state_(NULL),
+      next_handler_id_(0),
+      event_(base::WaitableEvent::ResetPolicy::AUTOMATIC,
+             base::WaitableEvent::InitialState::NOT_SIGNALED) {
   DCHECK(!current())
       << "There is already a MessagePumpMojo instance on this thread.";
   g_tls_current_pump.Pointer()->Set(this);