Upgraded the rest of Time.

Change-Id: I0ee083837e51d8f74a798b7ba14a3b6bb3859f35
diff --git a/y2016/vision/target_receiver.cc b/y2016/vision/target_receiver.cc
index 802c6e7..7ade8e7 100644
--- a/y2016/vision/target_receiver.cc
+++ b/y2016/vision/target_receiver.cc
@@ -201,8 +201,7 @@
       status.FetchAnother();
 
       ::aos::MutexLocker locker(&lock_);
-      data_[data_index_].time = monotonic_clock::time_point(
-          chrono::nanoseconds(status->sent_time.ToNSec()));
+      data_[data_index_].time = status->sent_time;
       data_[data_index_].left = status->estimated_left_position;
       data_[data_index_].right = status->estimated_right_position;
       ++data_index_;