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_test.cc b/quic/core/quic_dispatcher_test.cc
index 4ce9fa2..66b9e2e 100644
--- a/quic/core/quic_dispatcher_test.cc
+++ b/quic/core/quic_dispatcher_test.cc
@@ -93,7 +93,7 @@
                                     stream_helper());
   }
 
-  QuicCryptoServerStream::Helper* stream_helper() {
+  QuicCryptoServerStreamBase::Helper* stream_helper() {
     return QuicServerSessionBase::stream_helper();
   }
 };
@@ -108,7 +108,7 @@
                        crypto_config,
                        version_manager,
                        std::make_unique<MockQuicConnectionHelper>(),
-                       std::unique_ptr<QuicCryptoServerStream::Helper>(
+                       std::unique_ptr<QuicCryptoServerStreamBase::Helper>(
                            new QuicSimpleCryptoServerStreamHelper()),
                        std::make_unique<MockAlarmFactory>(),
                        kQuicDefaultConnectionIdLength),