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

net/dns/host_resolver_impl_fuzzer.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <vector>
 
@@ skipping 155 matching lines @@
       run_loop_.reset(new base::RunLoop());
       run_loop_->Run();
       run_loop_.reset();
       CHECK(!is_running_);
     }
   }
 
   // Cancel the request, if not already completed. Otherwise, does nothing.
   void Cancel() {
     if (is_running_)
-      host_resolver_->CancelRequest(handle_);
+      handle_.reset();
     is_running_ = false;
   }
 
   net::HostResolver* host_resolver_;
   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_;
 
   std::unique_ptr<base::RunLoop> run_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(DnsRequest);
 };
 
 }  // namespace
@@ skipping 35 matching lines @@
           break;
       }
     }
   }
 
   // Clean up any pending tasks, after deleting everything.
   base::RunLoop().RunUntilIdle();
 
   return 0;
 }