Create a QUIC wrapper around scoped_refptr.

net/quic/chromium/crypto/proof_source_chromium.h

Index: net/quic/chromium/crypto/proof_source_chromium.h
diff --git a/net/quic/chromium/crypto/proof_source_chromium.h b/net/quic/chromium/crypto/proof_source_chromium.h
index 5d50cc5e1220e60d9fc5c893065738c249c07587..95b892d61f99ac6b61e16222cdf62afab1b5f6f2 100644
--- a/net/quic/chromium/crypto/proof_source_chromium.h
+++ b/net/quic/chromium/crypto/proof_source_chromium.h
@@ -39,7 +39,7 @@ class NET_EXPORT_PRIVATE ProofSourceChromium : public ProofSource {
                 QuicVersion quic_version,
                 base::StringPiece chlo_hash,
                 const QuicTagVector& connection_options,
-                scoped_refptr<ProofSource::Chain>* out_chain,
+                QuicReferenceCountedPointer<ProofSource::Chain>* out_chain,
                 QuicCryptoProof* proof) override;
 
   void GetProof(const QuicSocketAddress& server_ip,
@@ -52,7 +52,7 @@ class NET_EXPORT_PRIVATE ProofSourceChromium : public ProofSource {
 
  private:
   std::unique_ptr<crypto::RSAPrivateKey> private_key_;
-  scoped_refptr<ProofSource::Chain> chain_;
+  QuicReferenceCountedPointer<ProofSource::Chain> chain_;
   std::string signed_certificate_timestamp_;
 
   DISALLOW_COPY_AND_ASSIGN(ProofSourceChromium);