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

net/quic/quic_connection.cc

Index: net/quic/quic_connection.cc
diff --git a/net/quic/quic_connection.cc b/net/quic/quic_connection.cc
index 5dd7dba2a2fed871cad74cd174e9b5ef7c68354e..c160f1858df499a63b97c3733b9248c341dc55d7 100644
--- a/net/quic/quic_connection.cc
+++ b/net/quic/quic_connection.cc
@@ -571,7 +571,7 @@ bool QuicConnection::OnCanWrite() {
       // We're not write blocked, but some stream didn't write out all of its
       // bytes.  Register for 'immediate' resumption so we'll keep writing after
       // other quic connections have had a chance to use the socket.
-      helper_->SetSendAlarm(QuicTime::Delta());
+      helper_->SetSendAlarm(QuicTime::Delta::Zero());
     }
   }