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

net/socket/transport_client_socket_unittest.cc

 // Copyright (c) 2012 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 <memory>
 #include <string>
 
 #include "base/bind.h"
 #include "base/memory/ref_counted.h"
 #include "base/run_loop.h"
@@ skipping 99 matching lines @@
   listen_port_ = local_address.port();
   listen_sock_->Accept(&connected_sock_,
                        base::Bind(&TransportClientSocketTest::AcceptCallback,
                                   base::Unretained(this)));
 
   AddressList addr;
   // MockHostResolver resolves everything to 127.0.0.1.
   std::unique_ptr<HostResolver> resolver(new MockHostResolver());
   HostResolver::RequestInfo info(HostPortPair("localhost", listen_port_));
   TestCompletionCallback callback;
+  std::unique_ptr<HostResolver::Request> request;
   int rv = resolver->Resolve(info, DEFAULT_PRIORITY, &addr, callback.callback(),
-                             NULL, BoundNetLog());
+                             &request, BoundNetLog());
   CHECK_EQ(ERR_IO_PENDING, rv);
   rv = callback.WaitForResult();
   CHECK_EQ(rv, OK);
   sock_ = socket_factory_->CreateTransportClientSocket(addr, NULL, &net_log_,
                                                        NetLog::Source());
 }
 
 int TransportClientSocketTest::DrainClientSocket(
     IOBuffer* buf,
     uint32_t buf_len,
@@ skipping 336 matching lines @@
 
   // It's possible the read is blocked because it's already read all the data.
   // Close the server socket, so there will at least be a 0-byte read.
   CloseServerSocket();
 
   rv = callback.WaitForResult();
   EXPECT_GE(rv, 0);
 }
 
 }  // namespace net