Fix object-lifetime issues in async GetProof callpaths

net/quic/core/quic_crypto_stream.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_QUIC_QUIC_CRYPTO_STREAM_H_
 #define NET_QUIC_QUIC_CRYPTO_STREAM_H_
 
 #include <stddef.h>
 
 #include "base/macros.h"
@@ skipping 18 matching lines @@
 // hello message, SHLO.  At this point both sides will have established
 // a crypto context they can use to send encrypted messages.
 //
 // For more details: http://goto.google.com/quic-crypto
 class NET_EXPORT_PRIVATE QuicCryptoStream
     : public ReliableQuicStream,
       public CryptoFramerVisitorInterface {
  public:
   explicit QuicCryptoStream(QuicSession* session);
 
+  ~QuicCryptoStream() override;
+
   // Returns the per-packet framing overhead associated with sending a
   // handshake message for |version|.
   static QuicByteCount CryptoMessageFramingOverhead(QuicVersion version);
 
   // CryptoFramerVisitorInterface implementation
   void OnError(CryptoFramer* framer) override;
   void OnHandshakeMessage(const CryptoHandshakeMessage& message) override;
 
   // ReliableQuicStream implementation
   void OnDataAvailable() override;
@@ skipping 23 matching lines @@
 
   bool encryption_established() const { return encryption_established_; }
   bool handshake_confirmed() const { return handshake_confirmed_; }
 
   const QuicCryptoNegotiatedParameters& crypto_negotiated_params() const;
 
  protected:
   bool encryption_established_;
   bool handshake_confirmed_;
 
-  QuicCryptoNegotiatedParameters crypto_negotiated_params_;
+  scoped_refptr<QuicCryptoNegotiatedParameters> crypto_negotiated_params_;
 
  private:
   CryptoFramer crypto_framer_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicCryptoStream);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_CRYPTO_STREAM_H_