Move UsbService to its own component.

chrome/browser/extensions/api/usb/usb_device_resource.cc

 // Copyright (c) 2012 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 "chrome/browser/extensions/api/usb/usb_device_resource.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/synchronization/lock.h"
-#include "chrome/browser/usb/usb_device_handle.h"
 #include "chrome/common/extensions/api/usb.h"
+#include "components/usb_service/usb_device_handle.h"
 #include "content/public/browser/browser_thread.h"
 #include "extensions/browser/api/api_resource.h"
 
 using content::BrowserThread;
+using usb_service::UsbDeviceHandle;
 
 namespace extensions {
 
 static base::LazyInstance<
     BrowserContextKeyedAPIFactory<ApiResourceManager<UsbDeviceResource> > >
     g_factory = LAZY_INSTANCE_INITIALIZER;
 
 // static
 template <>
 BrowserContextKeyedAPIFactory<ApiResourceManager<UsbDeviceResource> >*
 ApiResourceManager<UsbDeviceResource>::GetFactoryInstance() {
   return g_factory.Pointer();
 }
 
 UsbDeviceResource::UsbDeviceResource(const std::string& owner_extension_id,
                                      scoped_refptr<UsbDeviceHandle> device)
     : ApiResource(owner_extension_id), device_(device) {}
 
 UsbDeviceResource::~UsbDeviceResource() {
   BrowserThread::PostTask(BrowserThread::FILE,
                           FROM_HERE,
                           base::Bind(&UsbDeviceHandle::Close, device_));
 }
 
 }  // namespace extensions