Create a QUIC wrapper around scoped_refptr.

net/quic/chromium/crypto/proof_source_chromium.cc

Index: net/quic/chromium/crypto/proof_source_chromium.cc
diff --git a/net/quic/chromium/crypto/proof_source_chromium.cc b/net/quic/chromium/crypto/proof_source_chromium.cc
index 8e2c46af53126f2f84827ad66cf920d5831e95ac..dd8ce1f8881bf3cd71604337b878b808efda0c17 100644
--- a/net/quic/chromium/crypto/proof_source_chromium.cc
+++ b/net/quic/chromium/crypto/proof_source_chromium.cc
@@ -83,7 +83,7 @@ bool ProofSourceChromium::GetProof(
     QuicVersion quic_version,
     base::StringPiece chlo_hash,
     const QuicTagVector& /* connection_options */,
-    scoped_refptr<ProofSource::Chain>* out_chain,
+    QuicReferenceCountedPointer<ProofSource::Chain>* out_chain,
     QuicCryptoProof* proof) {
   DCHECK(proof != nullptr);
   DCHECK(private_key_.get()) << " this: " << this;
@@ -142,7 +142,7 @@ void ProofSourceChromium::GetProof(const QuicSocketAddress& server_addr,
                                    std::unique_ptr<Callback> callback) {
   // As a transitional implementation, just call the synchronous version of
   // GetProof, then invoke the callback with the results and destroy it.
-  scoped_refptr<ProofSource::Chain> chain;
+  QuicReferenceCountedPointer<ProofSource::Chain> chain;
   string signature;
   string leaf_cert_sct;
   QuicCryptoProof out_proof;