Change HostResolver::Resolve() to take an std::unique_ptr<Request>* rather than a RequestHandle*

net/dns/host_resolver_impl_fuzzer.cc

Index: net/dns/host_resolver_impl_fuzzer.cc
diff --git a/net/dns/host_resolver_impl_fuzzer.cc b/net/dns/host_resolver_impl_fuzzer.cc
index c9c9e170649f130e5b6f76e4406593c607934b22..1d3a0e87d4a7ecb2dbd85dd6fde9bb367cdbefaf 100644
--- a/net/dns/host_resolver_impl_fuzzer.cc
+++ b/net/dns/host_resolver_impl_fuzzer.cc
@@ -173,7 +173,7 @@ class DnsRequest {
   // Cancel the request, if not already completed. Otherwise, does nothing.
   void Cancel() {
     if (is_running_)
-      host_resolver_->CancelRequest(handle_);
+      handle_.reset();
     is_running_ = false;
   }
 
@@ -181,7 +181,7 @@ class DnsRequest {
   net::FuzzedDataProvider* data_provider_;
   std::vector<std::unique_ptr<DnsRequest>>* dns_requests_;
 
-  net::HostResolver::RequestHandle handle_;
+  std::unique_ptr<net::HostResolver::Request> handle_;
   net::AddressList address_list_;
 
   bool is_running_;