Change the default RTT from 60ms to 100ms, which is more typical of

net/quic/congestion_control/tcp_cubic_sender.cc

Index: net/quic/congestion_control/tcp_cubic_sender.cc
diff --git a/net/quic/congestion_control/tcp_cubic_sender.cc b/net/quic/congestion_control/tcp_cubic_sender.cc
index a978cf6dde3e971284e29423df97e2eb8d702832..b44d2da6b61147fd2923b9d45d96c25ab1e14184 100644
--- a/net/quic/congestion_control/tcp_cubic_sender.cc
+++ b/net/quic/congestion_control/tcp_cubic_sender.cc
@@ -24,7 +24,7 @@ const QuicByteCount kDefaultReceiveWindow = 64000;
 const int64 kInitialCongestionWindow = 10;
 const int kMaxBurstLength = 3;
 // Constants used for RTT calculation.
-const int kInitialRttMs = 60;  // At a typical RTT 60 ms.
+const int kInitialRttMs = 100;  // At a typical RTT 100 ms.
 const float kAlpha = 0.125f;
 const float kOneMinusAlpha = (1 - kAlpha);
 const float kBeta = 0.25f;