|  | // 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 "extensions/shell/browser/shell_device_client.h" | 
|  |  | 
|  | #include "content/public/browser/browser_thread.h" | 
|  | #include "device/usb/usb_service.h" | 
|  |  | 
|  | using content::BrowserThread; | 
|  |  | 
|  | namespace extensions { | 
|  |  | 
|  | ShellDeviceClient::ShellDeviceClient() = default; | 
|  |  | 
|  | ShellDeviceClient::~ShellDeviceClient() = default; | 
|  |  | 
|  | device::UsbService* ShellDeviceClient::GetUsbService() { | 
|  | DCHECK_CURRENTLY_ON(BrowserThread::UI); | 
|  | if (!usb_service_) | 
|  | usb_service_ = device::UsbService::Create(); | 
|  | return usb_service_.get(); | 
|  | } | 
|  |  | 
|  | }  // namespace extensions |