[Sync] Use ExtractIntegerValue to extract request_id from js args

chrome/browser/ui/webui/sync_internals_message_handler.cc

Index: chrome/browser/ui/webui/sync_internals_message_handler.cc
diff --git a/chrome/browser/ui/webui/sync_internals_message_handler.cc b/chrome/browser/ui/webui/sync_internals_message_handler.cc
index 57734e9194d69b8854d117d70b435eb5348d7b2e..e5f3d995d0be445ecc93d6120abf7de612a5408d 100644
--- a/chrome/browser/ui/webui/sync_internals_message_handler.cc
+++ b/chrome/browser/ui/webui/sync_internals_message_handler.cc
@@ -155,7 +155,7 @@ void SyncInternalsMessageHandler::HandleGetAllNodes(
     const base::ListValue* args) {
   DCHECK_EQ(1U, args->GetSize());
   int request_id = 0;
-  bool success = args->GetInteger(0, &request_id);
+  bool success = ExtractIntegerValue(args, &request_id);
   DCHECK(success);
 
   ProfileSyncService* service = GetProfileSyncService();