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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "extensions/browser/api/usb/usb_device_resource.h"
      6 
      7 #include <string>
      8 #include <vector>
      9 
     10 #include "base/bind.h"
     11 #include "base/bind_helpers.h"
     12 #include "base/lazy_instance.h"
     13 #include "base/synchronization/lock.h"
     14 #include "content/public/browser/browser_thread.h"
     15 #include "device/usb/usb_device_handle.h"
     16 #include "extensions/browser/api/api_resource.h"
     17 #include "extensions/common/api/usb.h"
     18 
     19 using content::BrowserThread;
     20 using device::UsbDeviceHandle;
     21 
     22 namespace extensions {
     23 
     24 static base::LazyInstance<
     25     BrowserContextKeyedAPIFactory<ApiResourceManager<UsbDeviceResource> > >
     26     g_factory = LAZY_INSTANCE_INITIALIZER;
     27 
     28 // static
     29 template <>
     30 BrowserContextKeyedAPIFactory<ApiResourceManager<UsbDeviceResource> >*
     31 ApiResourceManager<UsbDeviceResource>::GetFactoryInstance() {
     32   return g_factory.Pointer();
     33 }
     34 
     35 UsbDeviceResource::UsbDeviceResource(const std::string& owner_extension_id,
     36                                      scoped_refptr<UsbDeviceHandle> device)
     37     : ApiResource(owner_extension_id), device_(device) {
     38 }
     39 
     40 UsbDeviceResource::~UsbDeviceResource() {
     41   device_->Close();
     42 }
     43 
     44 bool UsbDeviceResource::IsPersistent() const {
     45   return false;
     46 }
     47 
     48 }  // namespace extensions
     49