Update from https://crrev.com/303153

net/quic/crypto/quic_crypto_server_config.h

Index: net/quic/crypto/quic_crypto_server_config.h
diff --git a/net/quic/crypto/quic_crypto_server_config.h b/net/quic/crypto/quic_crypto_server_config.h
index 30e0f6d784dca7cc8912443a060095a93ae092a9..dbbff1adf45ec13f4a88be5d43843735409c0984 100644
--- a/net/quic/crypto/quic_crypto_server_config.h
+++ b/net/quic/crypto/quic_crypto_server_config.h
@@ -326,6 +326,9 @@ class NET_EXPORT_PRIVATE QuicCryptoServerConfig {
   // Set and take ownership of the callback to invoke on primary config changes.
   void AcquirePrimaryConfigChangedCb(PrimaryConfigChangedCallback* cb);
 
+  // Returns true if this config has a |proof_source_|.
+  bool HasProofSource() const;
+
  private:
   friend class test::QuicCryptoServerConfigPeer;