Persist server's crypto config data to disk cache for 0-RTT

net/quic/crypto/quic_crypto_client_config.h

Index: net/quic/crypto/quic_crypto_client_config.h
diff --git a/net/quic/crypto/quic_crypto_client_config.h b/net/quic/crypto/quic_crypto_client_config.h
index b11c197fa612921128125189a63d241385c2ef82..4458eeb74a215566f6c7fc743e8492d55a68c730 100644
--- a/net/quic/crypto/quic_crypto_client_config.h
+++ b/net/quic/crypto/quic_crypto_client_config.h
@@ -83,6 +83,7 @@ class NET_EXPORT_PRIVATE QuicCryptoClientConfig : public QuicCryptoConfig {
     bool proof_valid() const;
     uint64 generation_counter() const;
     const ProofVerifyDetails* proof_verify_details() const;
+    QuicServerInfo* quic_server_info() const;
 
     void set_source_address_token(base::StringPiece token);
 
@@ -95,7 +96,17 @@ class NET_EXPORT_PRIVATE QuicCryptoClientConfig : public QuicCryptoConfig {
     // unchanged.
     void InitializeFrom(const CachedState& other);
 
+    // Fill out the |server_config_|, |source_address_token_|, |certs_| and
+    // |server_config_sig_| fields from |quic_server_info_|. |quic_server_info_|
+    // reads this information from the disk cache.
+    void LoadQuicServerInfo();
+
+    // Save the server config information so that we can perform 0-RTT handshake
+    // with a server.
+    void SaveQuicServerInfo();
+
    private:
+    // TODO(rtenneti): |server_config_id_| is not being used, delete it.
     std::string server_config_id_;      // An opaque id from the server.
     std::string server_config_;         // A serialized handshake message.
     std::string source_address_token_;  // An opaque proof of IP ownership.
@@ -105,6 +116,7 @@ class NET_EXPORT_PRIVATE QuicCryptoClientConfig : public QuicCryptoConfig {
     bool server_config_valid_;          // True if |server_config_| is correctly
                                         // signed and |certs_| has been
                                         // validated.
+    bool need_to_persist_;              // Persist to disk if True.
     // Generation counter associated with the |server_config_|, |certs_| and
     // |server_config_sig_| combination. It is incremented whenever we set
     // server_config_valid_ to false.