--- content/common/thread_type_switcher.mojom.orig	2026-08-12 09:02:10 UTC
+++ content/common/thread_type_switcher.mojom
@@ -8,7 +8,7 @@ import "mojo/public/mojom/base/thread_type.mojom";
 
 // A single thread type change request.
 struct ThreadTypeChange {
-  int32 platform_thread_id;
+  uint64 platform_thread_id;
   mojo_base.mojom.ThreadType thread_type;
 };