Refactor QuicClientSession so that it owns the underlying socket

net/quic/quic_connection_helper.cc

Index: net/quic/quic_connection_helper.cc
diff --git a/net/quic/quic_connection_helper.cc b/net/quic/quic_connection_helper.cc
index 3af51ac02f9eabfbc4ace636ae92aff33f1fba86..2d1fecf5c6e5cf601ca569482f45dc0b2dc8db77 100644
--- a/net/quic/quic_connection_helper.cc
+++ b/net/quic/quic_connection_helper.cc
@@ -122,19 +122,6 @@ void QuicConnectionHelper::UnregisterSendAlarmIfRegistered() {
   send_alarm_registered_ = false;
 }
 
-int QuicConnectionHelper::Read(IOBuffer* buf, int buf_len,
-                               const CompletionCallback& callback) {
-  return socket_->Read(buf, buf_len, callback);
-}
-
-void QuicConnectionHelper::GetLocalAddress(IPEndPoint* local_address) {
-  socket_->GetLocalAddress(local_address);
-}
-
-void QuicConnectionHelper::GetPeerAddress(IPEndPoint* peer_address) {
-  socket_->GetPeerAddress(peer_address);
-}
-
 void QuicConnectionHelper::OnRetransmissionAlarm() {
   QuicTime when = connection_->OnRetransmissionTimeout();
   if (!when.IsInitialized()) {