use std::unique_ptr for the callback argument of QUIC's ProofVerifier::Verify proof to make ownersh…

net/quic/crypto/proof_verifier_chromium.h

Index: net/quic/crypto/proof_verifier_chromium.h
diff --git a/net/quic/crypto/proof_verifier_chromium.h b/net/quic/crypto/proof_verifier_chromium.h
index fe84992e8663c99b15faed58a7bd1baa8376a8cd..b15751c7ff86ed087d21767e835db40731e06756 100644
--- a/net/quic/crypto/proof_verifier_chromium.h
+++ b/net/quic/crypto/proof_verifier_chromium.h
@@ -84,7 +84,7 @@ class NET_EXPORT_PRIVATE ProofVerifierChromium : public ProofVerifier {
       const ProofVerifyContext* verify_context,
       std::string* error_details,
       std::unique_ptr<ProofVerifyDetails>* verify_details,
-      ProofVerifierCallback* callback) override;
+      std::unique_ptr<ProofVerifierCallback> callback) override;
 
  private:
   class Job;