Remove raw DictionaryValue::Set in //components

components/sync/syncable/write_transaction_info.h

Index: components/sync/syncable/write_transaction_info.h
diff --git a/components/sync/syncable/write_transaction_info.h b/components/sync/syncable/write_transaction_info.h
index f4d7b0dd78f89ff9eeb8f67559653b782f8e728d..cf385cbb525c59519f008fb10eb7654909cefbe9 100644
--- a/components/sync/syncable/write_transaction_info.h
+++ b/components/sync/syncable/write_transaction_info.h
@@ -8,8 +8,10 @@
 #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"
 
@@ -26,8 +28,8 @@ struct 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