Use the task scheduler for blocking tasks in the USB service on Linux

device/usb/usb_service.cc

Index: device/usb/usb_service.cc
diff --git a/device/usb/usb_service.cc b/device/usb/usb_service.cc
index b560cd0c36441dae85e6dd3bfd4cc814037009fa..bff811288b70c52027e73702883b42ea2d756c61 100644
--- a/device/usb/usb_service.cc
+++ b/device/usb/usb_service.cc
@@ -8,6 +8,7 @@
 #include "base/feature_list.h"
 #include "base/location.h"
 #include "base/memory/ptr_util.h"
+#include "base/task_scheduler/post_task.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "components/device_event_log/device_event_log.h"
@@ -48,7 +49,13 @@ std::unique_ptr<UsbService> UsbService::Create(
 #if defined(OS_ANDROID)
   return base::WrapUnique(new UsbServiceAndroid(blocking_task_runner));
 #elif defined(USE_UDEV)
-  return base::WrapUnique(new UsbServiceLinux(blocking_task_runner));
+  return base::WrapUnique(
+      new UsbServiceLinux(base::CreateSequencedTaskRunnerWithTraits(
+          base::TaskTraits()
+              .MayBlock()
+              .WithPriority(base::TaskPriority::USER_VISIBLE)
+              .WithShutdownBehavior(
+                  base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN))));
 #elif defined(OS_WIN)
   if (base::FeatureList::IsEnabled(kNewUsbBackend))
     return base::WrapUnique(new UsbServiceWin(blocking_task_runner));