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

chromeos/network/host_resolver_impl_chromeos_unittest.cc

Index: chromeos/network/host_resolver_impl_chromeos_unittest.cc
diff --git a/chromeos/network/host_resolver_impl_chromeos_unittest.cc b/chromeos/network/host_resolver_impl_chromeos_unittest.cc
index 897376b3ec0ca926da145455e82b3b10fd201366..60a49db1aa2913eaa858a71b4a4de96b50b1e116 100644
--- a/chromeos/network/host_resolver_impl_chromeos_unittest.cc
+++ b/chromeos/network/host_resolver_impl_chromeos_unittest.cc
@@ -100,14 +100,11 @@ class HostResolverImplChromeOSTest : public testing::Test {
   }
 
   // Run from IO message loop.
+  std::unique_ptr<net::HostResolver::Request> request_;
   void Resolve(net::HostResolver::RequestInfo info) {
-    result_ = host_resolver_->Resolve(
-        info,
-        net::DEFAULT_PRIORITY,
-        &addresses_,
-        base::Bind(&ResolveCompletionCallback),
-        NULL,
-        net_log_);
+    result_ = host_resolver_->Resolve(info, net::DEFAULT_PRIORITY, &addresses_,
+                                      base::Bind(&ResolveCompletionCallback),
+                                      &request_, net_log_);
   }
 
   void SetDefaultIPConfigs(const std::string& default_device_path) {