Replace deprecated version of SetWithoutPathExpansion

apps/saved_files_service.cc

Index: apps/saved_files_service.cc
diff --git a/apps/saved_files_service.cc b/apps/saved_files_service.cc
index 4f093e72111afb64de52f5f617f262caac8c6a40..8865e5cc293ba82d128c30430699a39895bc548a 100644
--- a/apps/saved_files_service.cc
+++ b/apps/saved_files_service.cc
@@ -65,12 +65,14 @@ void AddSavedFileEntry(ExtensionPrefs* prefs,
     file_entries = update.Create();
   DCHECK(!file_entries->GetDictionaryWithoutPathExpansion(file_entry.id, NULL));
 
-  base::DictionaryValue* file_entry_dict = new base::DictionaryValue();
+  std::unique_ptr<base::DictionaryValue> file_entry_dict =
+      base::MakeUnique<base::DictionaryValue>();
   file_entry_dict->Set(kFileEntryPath, CreateFilePathValue(file_entry.path));
   file_entry_dict->SetBoolean(kFileEntryIsDirectory, file_entry.is_directory);
   file_entry_dict->SetInteger(kFileEntrySequenceNumber,
                               file_entry.sequence_number);
-  file_entries->SetWithoutPathExpansion(file_entry.id, file_entry_dict);
+  file_entries->SetWithoutPathExpansion(file_entry.id,
+                                        std::move(file_entry_dict));
 }
 
 // Updates the sequence_number of a SavedFileEntry persisted in ExtensionPrefs.