Add a Clone method to ProofVerifyDetails to allow for the proof verify

net/quic/crypto/quic_crypto_client_config.cc

Index: net/quic/crypto/quic_crypto_client_config.cc
diff --git a/net/quic/crypto/quic_crypto_client_config.cc b/net/quic/crypto/quic_crypto_client_config.cc
index 27d9d060489b1fba4bde17090cf9d88ee06a1800..cab7a1c4b95f7d6814e0b72f10d515fe5ce6d194 100644
--- a/net/quic/crypto/quic_crypto_client_config.cc
+++ b/net/quic/crypto/quic_crypto_client_config.cc
@@ -284,6 +284,9 @@ void QuicCryptoClientConfig::CachedState::InitializeFrom(
   certs_ = other.certs_;
   server_config_sig_ = other.server_config_sig_;
   server_config_valid_ = other.server_config_valid_;
+  if (other.proof_verify_details_) {
+    proof_verify_details_.reset(other.proof_verify_details_->Clone());
+  }
   ++generation_counter_;
 }