Remove raw base::DictionaryValue::Set

ios/chrome/browser/ui/webui/sync_internals/sync_internals_message_handler.cc

Index: ios/chrome/browser/ui/webui/sync_internals/sync_internals_message_handler.cc
diff --git a/ios/chrome/browser/ui/webui/sync_internals/sync_internals_message_handler.cc b/ios/chrome/browser/ui/webui/sync_internals/sync_internals_message_handler.cc
index 164e4c116ea8eb63da1547b623ba7d40ced48968..b4d52145fed2c9fb47140d8c2a8cff71c80693bd 100644
--- a/ios/chrome/browser/ui/webui/sync_internals/sync_internals_message_handler.cc
+++ b/ios/chrome/browser/ui/webui/sync_internals/sync_internals_message_handler.cc
@@ -4,6 +4,7 @@
 
 #include "ios/chrome/browser/ui/webui/sync_internals/sync_internals_message_handler.h"
 
+#include <utility>
 #include <vector>
 
 #include "base/logging.h"
@@ -125,7 +126,7 @@ void SyncInternalsMessageHandler::HandleRequestListOfTypes(
        it.Inc()) {
     type_list->AppendString(ModelTypeToString(it.Get()));
   }
-  event_details.Set(syncer::sync_ui_util::kTypes, type_list.release());
+  event_details.Set(syncer::sync_ui_util::kTypes, std::move(type_list));
   web_ui()->CallJavascriptFunction(
       syncer::sync_ui_util::kDispatchEvent,
       base::Value(syncer::sync_ui_util::kOnReceivedListOfTypes), event_details);
@@ -192,7 +193,7 @@ void SyncInternalsMessageHandler::EmitCounterUpdate(
   std::unique_ptr<base::DictionaryValue> details(new base::DictionaryValue());
   details->SetString(syncer::sync_ui_util::kModelType, ModelTypeToString(type));
   details->SetString(syncer::sync_ui_util::kCounterType, counter_type);
-  details->Set(syncer::sync_ui_util::kCounters, value.release());
+  details->Set(syncer::sync_ui_util::kCounters, std::move(value));
   web_ui()->CallJavascriptFunction(
       syncer::sync_ui_util::kDispatchEvent,
       base::Value(syncer::sync_ui_util::kOnCountersUpdated), *details);