Index: content/common/file_path_watcher/file_path_watcher.h |
diff --git a/content/common/file_path_watcher/file_path_watcher.h b/content/common/file_path_watcher/file_path_watcher.h |
index 7c784a8bc44fa9777ace5c93f5d1957069a2ee85..8d73b786e69559bdd7e10f3ac1e3f7cc3646c313 100644 |
--- a/content/common/file_path_watcher/file_path_watcher.h |
+++ b/content/common/file_path_watcher/file_path_watcher.h |
@@ -40,6 +40,8 @@ class FilePathWatcher { |
// by the Mac implementation right now, and must be backed by a CFRunLoop |
// based MessagePump. This is usually going to be a MessageLoop of type |
// TYPE_UI. |
+ // OnFilePathChanged() will be called on the same thread as Watch() is called, |
+ // which should have a MessageLoop of TYPE_IO. |
bool Watch(const FilePath& path, |
Delegate* delegate, |
base::MessageLoopProxy* loop) WARN_UNUSED_RESULT; |