Plumb the handle signals state to Awakable::Awake().

mojo/edk/system/waiter.cc

Index: mojo/edk/system/waiter.cc
diff --git a/mojo/edk/system/waiter.cc b/mojo/edk/system/waiter.cc
index 0fc8b6c543d04354834dae5b873f1f1644d3fe7d..1ede9d071b7b6c2166b34e16f7f0ecca1c8bc44b 100644
--- a/mojo/edk/system/waiter.cc
+++ b/mojo/edk/system/waiter.cc
@@ -91,14 +91,16 @@ MojoResult Waiter::Wait(MojoDeadline deadline, uint64_t* context) {
   return awake_result_;
 }
 
-bool Waiter::Awake(MojoResult result, uint64_t context) {
+bool Waiter::Awake(uint64_t context,
+                   AwakeReason reason,
+                   const HandleSignalsState& signals_state) {
   MutexLocker locker(&mutex_);
 
   if (awoken_)
     return true;
 
   awoken_ = true;
-  awake_result_ = result;
+  awake_result_ = MojoResultForAwakeReason(reason);
   awake_context_ = context;
   cv_.Signal();
   // |cv_.Wait()|/|cv_.WaitWithTimeout()| will return after |mutex_| is