Use unique_ptrs to manage callback lifetimes in some QUIC code

net/tools/quic/stateless_rejector.cc

Index: net/tools/quic/stateless_rejector.cc
diff --git a/net/tools/quic/stateless_rejector.cc b/net/tools/quic/stateless_rejector.cc
index 005c335aa2a9059c664d2e330bb56ff706153481..42bab60131db58d176659a6a338c6eb12f8cd8ab 100644
--- a/net/tools/quic/stateless_rejector.cc
+++ b/net/tools/quic/stateless_rejector.cc
@@ -19,8 +19,8 @@ class StatelessRejector::ValidateCallback
 
   ~ValidateCallback() override {}
 
-  void RunImpl(std::unique_ptr<Result> result,
-               std::unique_ptr<ProofSource::Details> /* proof_source_details */)
+  void Run(std::unique_ptr<Result> result,
+           std::unique_ptr<ProofSource::Details> /* proof_source_details */)
       override {
     StatelessRejector* rejector_ptr = rejector_.get();
     rejector_ptr->ProcessClientHello(*result, std::move(rejector_),
@@ -92,7 +92,8 @@ void StatelessRejector::Process(std::unique_ptr<StatelessRejector> rejector,
       rejector_ptr->chlo_, rejector_ptr->client_address_.address(),
       rejector_ptr->server_address_.address(), rejector_ptr->version_,
       rejector_ptr->clock_, &rejector_ptr->proof_,
-      new ValidateCallback(std::move(rejector), std::move(cb)));
+      std::unique_ptr<ValidateCallback>(
+          new ValidateCallback(std::move(rejector), std::move(cb))));
 }
 
 void StatelessRejector::ProcessClientHello(