Remove TaskTraits::with_file_io().

components/task_scheduler_util/browser/initialization.cc

Index: components/task_scheduler_util/browser/initialization.cc
diff --git a/components/task_scheduler_util/browser/initialization.cc b/components/task_scheduler_util/browser/initialization.cc
index 3f1624b99708e7f09669deabd9179cb3af89f815..70b28773f01d8ddc157fb5298951ef1d1de448f3 100644
--- a/components/task_scheduler_util/browser/initialization.cc
+++ b/components/task_scheduler_util/browser/initialization.cc
@@ -60,7 +60,7 @@ GetBrowserWorkerPoolParamsFromVariations() {
 size_t BrowserWorkerPoolIndexForTraits(const base::TaskTraits& traits) {
   const bool is_background =
       traits.priority() == base::TaskPriority::BACKGROUND;
-  if (traits.with_file_io())
+  if (traits.may_block() || traits.with_base_sync_primitives())
     return is_background ? BACKGROUND_FILE_IO : FOREGROUND_FILE_IO;
   return is_background ? BACKGROUND : FOREGROUND;
 }