Use the task scheduler in the new Windows USB backend

chrome/browser/chrome_device_client.cc

Index: chrome/browser/chrome_device_client.cc
diff --git a/chrome/browser/chrome_device_client.cc b/chrome/browser/chrome_device_client.cc
index 7e4bcfd173b6bc9638e7db9af8a01e374b25cfec..9007a2de85434344da357b4bad626b59561b6958 100644
--- a/chrome/browser/chrome_device_client.cc
+++ b/chrome/browser/chrome_device_client.cc
@@ -31,10 +31,8 @@ void ChromeDeviceClient::Shutdown() {
 
 device::UsbService* ChromeDeviceClient::GetUsbService() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  if (!usb_service_) {
-    usb_service_ = device::UsbService::Create(
-        BrowserThread::GetTaskRunnerForThread(BrowserThread::FILE));
-  }
+  if (!usb_service_)
+    usb_service_ = device::UsbService::Create();
   return usb_service_.get();
 }