Move QuicCryptoServerStream::Helper to QuicCryptoServerStreamBase

gfe-relnote: rename class - no behavior change
PiperOrigin-RevId: 296246242
Change-Id: I68425fe4ba7a2040eed4bf93835639e6f353a406
diff --git a/quic/core/quic_dispatcher.cc b/quic/core/quic_dispatcher.cc
index bcb7cd1..a92dfb7 100644
--- a/quic/core/quic_dispatcher.cc
+++ b/quic/core/quic_dispatcher.cc
@@ -221,7 +221,7 @@
     const QuicCryptoServerConfig* crypto_config,
     QuicVersionManager* version_manager,
     std::unique_ptr<QuicConnectionHelperInterface> helper,
-    std::unique_ptr<QuicCryptoServerStream::Helper> session_helper,
+    std::unique_ptr<QuicCryptoServerStreamBase::Helper> session_helper,
     std::unique_ptr<QuicAlarmFactory> alarm_factory,
     uint8_t expected_server_connection_id_length)
     : config_(config),