Add plumbing for accessing latest country in variations service in Java

components/variations/service/variations_service.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 "components/variations/service/variations_service.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <utility>
@@ skipping 911 matching lines @@
       list_value->GetSize() == 2 && list_value->GetString(1, &stored_country);
 
   if (got_stored_country && stored_country == country_override)
     return false;
 
   base::Version version(version_info::GetVersionNumber());
   StorePermanentCountry(version, country_override);
   return true;
 }
 
+std::string VariationsService::GetLatestCountry() const {
+  return local_state_->GetString(prefs::kVariationsCountry);
+}
+
 }  // namespace variations