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

net/spdy/spdy_session_unittest.cc

Index: net/spdy/spdy_session_unittest.cc
diff --git a/net/spdy/spdy_session_unittest.cc b/net/spdy/spdy_session_unittest.cc
index bc8a5d97daac250db325bcad4c4c745fa9861bd2..fec5bb1776ddb652fc391ccbf0164db0d267ca71 100644
--- a/net/spdy/spdy_session_unittest.cc
+++ b/net/spdy/spdy_session_unittest.cc
@@ -2963,10 +2963,11 @@ TEST_F(SpdySessionTest, CloseOneIdleConnectionWithAlias) {
                       PRIVACY_MODE_DISABLED);
   HostResolver::RequestInfo info(key2.host_port_pair());
   AddressList addresses;
+  std::unique_ptr<HostResolver::Request> request;
   // Pre-populate the DNS cache, since a synchronous resolution is required in
   // order to create the alias.
   session_deps_.host_resolver->Resolve(info, DEFAULT_PRIORITY, &addresses,
-                                       CompletionCallback(), nullptr,
+                                       CompletionCallback(), &request,
                                        BoundNetLog());
   // Get a session for |key2|, which should return the session created earlier.
   base::WeakPtr<SpdySession> session2 =