Use the task scheduler in the new Windows USB backend

device/usb/usb_device_handle_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "device/usb/usb_device_handle.h"
 
 #include <stddef.h>
 
 #include <memory>
 
@@ skipping 11 matching lines @@
 
 namespace device {
 
 namespace {
 
 class UsbDeviceHandleTest : public ::testing::Test {
  public:
   UsbDeviceHandleTest()
       : io_thread_(base::TestIOThread::kAutoStart),
         scoped_task_environment_(
-            base::test::ScopedTaskEnvironment::MainThreadType::UI),
-        device_client_(io_thread_.task_runner()) {}
+            base::test::ScopedTaskEnvironment::MainThreadType::UI) {}
 
  protected:
   base::TestIOThread io_thread_;
 
  private:
   base::test::ScopedTaskEnvironment scoped_task_environment_;
   TestDeviceClient device_client_;
 };
 
 class TestOpenCallback {
@@ skipping 402 matching lines @@
       10,  // 10 millisecond timeout
       base::Bind(&ExpectTimeoutAndClose, handle, run_loop.QuitClosure()));
   // Drop handle so that the completion callback holds the last reference.
   handle = nullptr;
   run_loop.Run();
 }
 
 }  // namespace
 
 }  // namespace device