Persist the server config that is received via kSCUP.

net/quic/quic_crypto_client_stream.h

Index: net/quic/quic_crypto_client_stream.h
diff --git a/net/quic/quic_crypto_client_stream.h b/net/quic/quic_crypto_client_stream.h
index 3be89abca1887db0e6241e6b77ae11860ba3a168..e782c039450f431286ed4dddeacf86f3aeec8780 100644
--- a/net/quic/quic_crypto_client_stream.h
+++ b/net/quic/quic_crypto_client_stream.h
@@ -106,6 +106,9 @@ class NET_EXPORT_PRIVATE QuicCryptoClientStream : public QuicCryptoStream {
     STATE_GET_CHANNEL_ID,
     STATE_GET_CHANNEL_ID_COMPLETE,
     STATE_RECV_SHLO,
+    STATE_INITIALIZE_SCUP,
+    STATE_VERIFY_PROOF_SCUP,
+    STATE_VERIFY_PROOF_COMPLETE_SCUP,
   };
 
   // Handles new server config and optional source-address token provided by the
@@ -117,6 +120,19 @@ class NET_EXPORT_PRIVATE QuicCryptoClientStream : public QuicCryptoStream {
   // |in| may be NULL if the call did not result from a received message.
   void DoHandshakeLoop(const CryptoHandshakeMessage* in);
 
+  // DoProofVeifyLoop performs a step of the proof verify state machine.
+  void DoProofVeifyLoop();
+
+  // Starts the proof verification. Returns the QuicAsyncStatus returned by the
+  // ProofVerifier's VerifyProof.
+  QuicAsyncStatus DoVerifyProof(QuicCryptoClientConfig::CachedState* cached);
+
+  // If proof is valid then it sets the proof as valid (which persists the
+  // server config) and returns QUIC_NO_ERROR. If not, then it closes
+  // the connection and returns QUIC_PROOF_INVALID.
+  QuicErrorCode DoVerifyProofComplete(
+      QuicCryptoClientConfig::CachedState* cached);
+
   // Called to set the proof of |cached| valid.  Also invokes the session's
   // OnProofValid() method.
   void SetCachedProofValid(QuicCryptoClientConfig::CachedState* cached);