Write a regression test demonstrating that a QuicCryptoClientStream can receive and use a server co…

net/quic/core/quic_crypto_client_stream.h

Index: net/quic/core/quic_crypto_client_stream.h
diff --git a/net/quic/core/quic_crypto_client_stream.h b/net/quic/core/quic_crypto_client_stream.h
index 94e3fdae44decdd6eda87d54fe8eff0eed5a08a1..201702765edf34692a27697dfa4390a082122ef6 100644
--- a/net/quic/core/quic_crypto_client_stream.h
+++ b/net/quic/core/quic_crypto_client_stream.h
@@ -99,6 +99,8 @@ class NET_EXPORT_PRIVATE QuicCryptoClientStream
   // ChannelIDSource operated asynchronously. Intended for testing.
   bool WasChannelIDSourceCallbackRun() const;
 
+  std::string chlo_hash() const { return chlo_hash_; }
+
  private:
   // ChannelIDSourceCallbackImpl is passed as the callback method to
   // GetChannelIDKey. The ChannelIDSource calls this class with the result of