Remove default constructors for QuicTime and QuicTime::Delta and used static Zero() methods instead…

net/quic/congestion_control/fix_rate_sender.cc

Index: net/quic/congestion_control/fix_rate_sender.cc
diff --git a/net/quic/congestion_control/fix_rate_sender.cc b/net/quic/congestion_control/fix_rate_sender.cc
index fc9b6c71e0d9860d0654d8587daec5e6cf8ddba9..c554e4d1f3b1a2211ed3e60d8bf3925bd69fe864 100644
--- a/net/quic/congestion_control/fix_rate_sender.cc
+++ b/net/quic/congestion_control/fix_rate_sender.cc
@@ -65,7 +65,7 @@ QuicTime::Delta FixRateSender::TimeUntilSend(bool /*retransmit*/) {
       // We need an ack before we send more.
       return QuicTime::Delta::Infinite();
     }
-    QuicTime::Delta zero_time;
+    QuicTime::Delta zero_time(QuicTime::Delta::Zero());
     return paced_sender_.TimeUntilSend(zero_time);
   }
   QuicTime::Delta time_remaining = fix_rate_leaky_bucket_.TimeRemaining();