Extract Awakable from Waiter

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 39cb14e90bea3899e7fbac7717b2966d9bab05ca..ea243ed1406785ac2479b55b793cf5c5fcc1357a 100644
--- a/mojo/edk/system/waiter_test_utils.cc
+++ b/mojo/edk/system/waiter_test_utils.cc
@@ -55,14 +55,14 @@ WaiterThread::~WaiterThread() {
 void WaiterThread::Run() {
   waiter_.Init();
 
-  *result_out_ = dispatcher_->AddWaiter(&waiter_, handle_signals_, context_,
-                                        signals_state_out_);
+  *result_out_ = dispatcher_->AddAwakable(&waiter_, handle_signals_, context_,
+                                          signals_state_out_);
   if (*result_out_ != MOJO_RESULT_OK)
     return;
 
   *did_wait_out_ = true;
   *result_out_ = waiter_.Wait(deadline_, context_out_);
-  dispatcher_->RemoveWaiter(&waiter_, signals_state_out_);
+  dispatcher_->RemoveAwakable(&waiter_, signals_state_out_);
 }
 
 }  // namespace test