Upgraded the rest of Time.

Change-Id: I0ee083837e51d8f74a798b7ba14a3b6bb3859f35
diff --git a/y2015/control_loops/claw/claw.h b/y2015/control_loops/claw/claw.h
index 58c3cc1..324f9f3 100644
--- a/y2015/control_loops/claw/claw.h
+++ b/y2015/control_loops/claw/claw.h
@@ -87,7 +87,7 @@
   State state_ = UNINITIALIZED;
 
   // The time when we last changed the claw piston state.
-  ::aos::time::Time last_piston_edge_;
+  ::aos::monotonic_clock::time_point last_piston_edge_;
 
   // The state feedback control loop to talk to.
   ::std::unique_ptr<ClawCappedStateFeedbackLoop> claw_loop_;