Revert of Stop passing raw pointers to base::Value API in c/b/ui

chrome/browser/ui/app_list/search/common/webservice_cache.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_APP_LIST_SEARCH_COMMON_WEBSERVICE_CACHE_H_
 #define CHROME_BROWSER_UI_APP_LIST_SEARCH_COMMON_WEBSERVICE_CACHE_H_
 
 #include <memory>
 #include <utility>
 
@@ skipping 70 matching lines @@
   void OnCacheLoaded(std::unique_ptr<base::DictionaryValue>);
 
   // Populates the payload parameter with the corresponding payload stored
   // in the given dictionary. If the dictionary is invalid for any reason,
   // this method will return false.
   bool PayloadFromDict(const base::DictionaryValue* dict, Payload* payload);
 
   // Returns a dictionary value for a given payload. The returned dictionary
   // will be owned by the data_store_ cached_dict, and freed on the destruction
   // of our dictionary datastore.
-  std::unique_ptr<base::DictionaryValue> DictFromPayload(
-      const Payload& payload);
+  base::DictionaryValue* DictFromPayload(const Payload& payload);
 
   // Trims our MRU cache, making sure that any element that is removed is also
   // removed from the dictionary data store.
   void TrimCache();
 
   // Prepends a type string to the given query and returns a new query string.
   std::string PrependType(QueryType type, const std::string& query);
 
   Cache cache_;
   scoped_refptr<DictionaryDataStore> data_store_;
 
   bool cache_loaded_;
 
   DISALLOW_COPY_AND_ASSIGN(WebserviceCache);
 };
 
 }  // namespace app_list
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_SEARCH_COMMON_WEBSERVICE_CACHE_H_