Use std::unique_ptr for base::DictionaryValue and base::ListValue's internal store.

remoting/test/host_list_fetcher.cc

 // Copyright 2015 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 "remoting/test/host_list_fetcher.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/json/json_reader.h"
 #include "base/logging.h"
@@ skipping 70 matching lines @@
   }
 
   const base::ListValue* hosts = nullptr;
   if (!data->GetList("items", &hosts)) {
     LOG(ERROR) << "Failed to find hosts in Hostlist response data";
     return false;
   }
 
   // Any host_info with malformed data will not be added to the hostlist.
   base::DictionaryValue* host_dict;
-  for (base::Value* host_info : *hosts) {
+  for (const auto& host_info : *hosts) {
     HostInfo host;
     if (host_info->GetAsDictionary(&host_dict) &&
         host.ParseHostInfo(*host_dict)) {
       hostlist->push_back(host);
     }
   }
   return true;
 }
 
 void HostListFetcher::OnURLFetchComplete(
     const net::URLFetcher* source) {
   DCHECK(source);
   VLOG(2) << "URL Fetch Completed for: " << source->GetOriginalURL();
 
   std::vector<HostInfo> hostlist;
 
   if (!ProcessResponse(&hostlist)) {
     hostlist.clear();
   }
   base::ResetAndReturn(&hostlist_callback_).Run(hostlist);
 }
 
 }  // namespace test
 }  // namespace remoting