Added helper methods to get/set previous_cached_network_params_.

net/quic/quic_crypto_server_stream.cc

Index: net/quic/quic_crypto_server_stream.cc
diff --git a/net/quic/quic_crypto_server_stream.cc b/net/quic/quic_crypto_server_stream.cc
index e912c32325b2298d0f73413b0231a9c178254987..1c110daa3e06463045450d5b7c5c9506cca04e92 100644
--- a/net/quic/quic_crypto_server_stream.cc
+++ b/net/quic/quic_crypto_server_stream.cc
@@ -189,6 +189,12 @@ void QuicCryptoServerStream::OnServerHelloAcked() {
   session()->connection()->OnHandshakeComplete();
 }
 
+void QuicCryptoServerStream::set_previous_cached_network_params(
+    CachedNetworkParameters cached_network_params) {
+  previous_cached_network_params_.reset(
+      new CachedNetworkParameters(cached_network_params));
+}
+
 bool QuicCryptoServerStream::GetBase64SHA256ClientChannelID(
     string* output) const {
   if (!encryption_established_ ||
@@ -245,6 +251,11 @@ QuicErrorCode QuicCryptoServerStream::ProcessClientHello(
 void QuicCryptoServerStream::OverrideQuicConfigDefaults(QuicConfig* config) {
 }
 
+CachedNetworkParameters*
+QuicCryptoServerStream::get_previous_cached_network_params() {
+  return previous_cached_network_params_.get();
+}
+
 QuicCryptoServerStream::ValidateCallback::ValidateCallback(
     QuicCryptoServerStream* parent) : parent_(parent) {
 }