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

chrome/browser/interests/interests_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 "chrome/browser/interests/interests_fetcher.h"
 
 #include "base/command_line.h"
 #include "base/json/json_reader.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
@@ skipping 164 matching lines @@
     return nullptr;
   }
 
   const base::ListValue* interests_list = nullptr;
   if (!dict->GetList(kIdInterests, &interests_list)) {
     DLOG(WARNING) << "Failed to parse interests list.";
     return nullptr;
   }
 
   std::unique_ptr<std::vector<Interest>> res(new std::vector<Interest>());
-  for (const base::Value* entry : *interests_list) {
+  for (const auto& entry : *interests_list) {
     const base::DictionaryValue* interest_dict = nullptr;
     if (!entry->GetAsDictionary(&interest_dict)) {
       DLOG(WARNING) << "Failed to parse interest dictionary.";
       continue;
     }
 
     // Extract the parts of the interest.
     std::string name;
     std::string image_url;
     double relevance = 0;
@@ skipping 11 matching lines @@
     if (!interest_dict->GetDouble(kIdInterestRelevance, &relevance)) {
       DLOG(WARNING) << "Failed to parse interest relevance.";
       continue;
     }
 
     res->push_back(Interest{name, GURL(image_url), relevance});
   }
 
   return res;
 }