Remove raw DictionaryValue::Set in //components

components/sync/syncable/write_transaction_info.h

 // Copyright 2012 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 COMPONENTS_SYNC_SYNCABLE_WRITE_TRANSACTION_INFO_H_
 #define COMPONENTS_SYNC_SYNCABLE_WRITE_TRANSACTION_INFO_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
+#include <memory>
 #include <string>
 
+#include "base/values.h"
 #include "components/sync/syncable/entry_kernel.h"
 #include "components/sync/syncable/syncable_base_transaction.h"
 
 namespace syncer {
 namespace syncable {
 
 // A struct describing the changes made during a transaction.
 struct WriteTransactionInfo {
   WriteTransactionInfo(int64_t id,
                        tracked_objects::Location location,
                        WriterTag writer,
                        ImmutableEntryKernelMutationMap mutations);
   WriteTransactionInfo();
   WriteTransactionInfo(const WriteTransactionInfo& other);
   ~WriteTransactionInfo();
 
-  // Caller owns the return value.
-  base::DictionaryValue* ToValue(size_t max_mutations_size) const;
+  std::unique_ptr<base::DictionaryValue> ToValue(
+      size_t max_mutations_size) const;
 
   int64_t id;
   // If tracked_objects::Location becomes assignable, we can use that
   // instead.
   std::string location_string;
   WriterTag writer;
   ImmutableEntryKernelMutationMap mutations;
 };
 
 using ImmutableWriteTransactionInfo = Immutable<WriteTransactionInfo>;
 
 }  // namespace syncable
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_SYNCABLE_WRITE_TRANSACTION_INFO_H_