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

net/socket/transport_client_socket_unittest.cc

Index: net/socket/transport_client_socket_unittest.cc
diff --git a/net/socket/transport_client_socket_unittest.cc b/net/socket/transport_client_socket_unittest.cc
index 858434d75d8d058770d10fc4d8a0f489cb3a32ac..63cca45d3ae8f69a60a388b12c1de9f47513d5a9 100644
--- a/net/socket/transport_client_socket_unittest.cc
+++ b/net/socket/transport_client_socket_unittest.cc
@@ -117,8 +117,9 @@ void TransportClientSocketTest::SetUp() {
   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);