When talking >=QUIC_VERSION_22, regularly send updated bandwidth

net/quic/quic_session.cc

Index: net/quic/quic_session.cc
diff --git a/net/quic/quic_session.cc b/net/quic/quic_session.cc
index f2277271695e183fa1dd83cf27320e676fb21176..d327da69da47e18db9322817e12469390958d859 100644
--- a/net/quic/quic_session.cc
+++ b/net/quic/quic_session.cc
@@ -64,6 +64,10 @@ class VisitorShim : public QuicConnectionVisitorInterface {
     session_->PostProcessAfterData();
   }
 
+  virtual void OnCongestionWindowChange(QuicTime now) OVERRIDE {
+    session_->OnCongestionWindowChange(now);
+  }
+
   virtual void OnSuccessfulVersionNegotiation(
       const QuicVersion& version) OVERRIDE {
     session_->OnSuccessfulVersionNegotiation(version);