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

chromeos/system/statistics_provider.cc

 // Copyright 2013 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 "chromeos/system/statistics_provider.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 75 matching lines @@
 // Returns true on success.
 bool JoinListValuesToString(const base::DictionaryValue* dictionary,
                             const std::string key,
                             std::string* result) {
   const base::ListValue* list = nullptr;
   if (!dictionary->GetListWithoutPathExpansion(key, &list))
     return false;
 
   std::string buffer;
   bool first = true;
-  for (const base::Value* v : *list) {
+  for (const auto& v : *list) {
     std::string value;
     if (!v->GetAsString(&value))
       return false;
 
     if (first)
       first = false;
     else
       buffer += ',';
 
     buffer += value;
@@ skipping 464 matching lines @@
   return StatisticsProviderImpl::GetInstance();
 }
 
 // static
 void StatisticsProvider::SetTestProvider(StatisticsProvider* test_provider) {
   g_test_statistics_provider = test_provider;
 }
 
 }  // namespace system
 }  // namespace chromeos