Add IsResumption method to QUIC client handshakers

gfe-relnote: no behavior change: adding unused method
PiperOrigin-RevId: 279141655
Change-Id: Icfe08baf904b37a702c73c071334b11bb6cf2234
diff --git a/quic/core/quic_crypto_client_stream.cc b/quic/core/quic_crypto_client_stream.cc
index 12b538f..354debb 100644
--- a/quic/core/quic_crypto_client_stream.cc
+++ b/quic/core/quic_crypto_client_stream.cc
@@ -63,6 +63,10 @@
   return handshaker_->num_sent_client_hellos();
 }
 
+bool QuicCryptoClientStream::IsResumption() const {
+  return handshaker_->IsResumption();
+}
+
 int QuicCryptoClientStream::num_scup_messages_received() const {
   return handshaker_->num_scup_messages_received();
 }