Rationalize AddAwakable...() and RemoveAwakable...() methods.

mojo/edk/system/waiter_test_utils.cc

Index: mojo/edk/system/waiter_test_utils.cc
diff --git a/mojo/edk/system/waiter_test_utils.cc b/mojo/edk/system/waiter_test_utils.cc
index b2423ab40de58959012a8c5697a359e1a0a5f746..c261be8cfdef5bc19582a4c81c52fd27b4965a97 100644
--- a/mojo/edk/system/waiter_test_utils.cc
+++ b/mojo/edk/system/waiter_test_utils.cc
@@ -58,14 +58,14 @@ WaiterThread::~WaiterThread() {
 void WaiterThread::Run() {
   waiter_.Init();
 
-  *result_out_ = dispatcher_->AddAwakable(&waiter_, handle_signals_, context_,
-                                          signals_state_out_);
+  *result_out_ = dispatcher_->AddAwakable(&waiter_, context_, false,
+                                          handle_signals_, signals_state_out_);
   if (*result_out_ != MOJO_RESULT_OK)
     return;
 
   *did_wait_out_ = true;
   *result_out_ = waiter_.Wait(deadline_, context_out_, nullptr);
-  dispatcher_->RemoveAwakable(&waiter_, signals_state_out_);
+  dispatcher_->RemoveAwakable(false, &waiter_, 0, signals_state_out_);
 }
 
 }  // namespace test