Make monotonic_now a required parameter to PhasedLoop

This prepares us much better for mocking out time as part of the event
loop conversion.

Change-Id: I57560b97b265ddd41fe7a4e9f74d7b1324d15955
diff --git a/y2019/actors/autonomous_actor.h b/y2019/actors/autonomous_actor.h
index 864a328..13b336d 100644
--- a/y2019/actors/autonomous_actor.h
+++ b/y2019/actors/autonomous_actor.h
@@ -110,6 +110,7 @@
 
   bool WaitForGamePiece() {
     ::aos::time::PhasedLoop phased_loop(::std::chrono::milliseconds(5),
+                                        event_loop()->monotonic_now(),
                                         ::std::chrono::milliseconds(5) / 2);
 
     while (true) {
@@ -161,6 +162,7 @@
 
   bool WaitForSuperstructureDone() {
     ::aos::time::PhasedLoop phased_loop(::std::chrono::milliseconds(5),
+                                        event_loop()->monotonic_now(),
                                         ::std::chrono::milliseconds(5) / 2);
 
     while (true) {