Use unique_ptrs to manage callback lifetimes in some QUIC code

net/quic/core/quic_crypto_server_stream.cc

Index: net/quic/core/quic_crypto_server_stream.cc
diff --git a/net/quic/core/quic_crypto_server_stream.cc b/net/quic/core/quic_crypto_server_stream.cc
index 780e5627e8a818039bf63fd2f552792515e90af2..6f434184f4e58f90f5f038134728962ad13b9353 100644
--- a/net/quic/core/quic_crypto_server_stream.cc
+++ b/net/quic/core/quic_crypto_server_stream.cc
@@ -115,12 +115,12 @@ void QuicCryptoServerStream::OnHandshakeMessage(
 
   CryptoUtils::HashHandshakeMessage(message, &chlo_hash_);
 
-  validate_client_hello_cb_ = new ValidateCallback(this);
+  std::unique_ptr<ValidateCallback> cb(new ValidateCallback(this));
+  validate_client_hello_cb_ = cb.get();
   crypto_config_->ValidateClientHello(
       message, session()->connection()->peer_address().address(),
       session()->connection()->self_address().address(), version(),
-      session()->connection()->clock(), &crypto_proof_,
-      validate_client_hello_cb_);
+      session()->connection()->clock(), &crypto_proof_, std::move(cb));
 }
 
 void QuicCryptoServerStream::FinishProcessingHandshakeMessage(
@@ -428,7 +428,7 @@ void QuicCryptoServerStream::ValidateCallback::Cancel() {
   parent_ = nullptr;
 }
 
-void QuicCryptoServerStream::ValidateCallback::RunImpl(
+void QuicCryptoServerStream::ValidateCallback::Run(
     std::unique_ptr<Result> result,
     std::unique_ptr<ProofSource::Details> details) {
   if (parent_ != nullptr) {