Implement getConfiguration in WebUSBDeviceImpl.

device/devices_app/usb/device_impl.cc

 // Copyright 2015 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/devices_app/usb/device_impl.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/stl_util.h"
 #include "device/devices_app/usb/type_converters.h"
@@ skipping 98 matching lines @@
     size_t buffer_size) {
   callback.Run(mojo::ConvertTo<TransferStatus>(status));
 }
 
 void DeviceImpl::GetDeviceInfo(const GetDeviceInfoCallback& callback) {
   callback.Run(DeviceInfo::From(*device_));
 }
 
 void DeviceImpl::GetConfiguration(const GetConfigurationCallback& callback) {
   const UsbConfigDescriptor* config = device_->GetActiveConfiguration();
-  callback.Run(config ? ConfigurationInfo::From(*config) : nullptr);
+  callback.Run(config ? config->configuration_value : 0);
 }
 
 void DeviceImpl::Open(const OpenCallback& callback) {
   device_->Open(
       base::Bind(&DeviceImpl::OnOpen, weak_factory_.GetWeakPtr(), callback));
 }
 
 void DeviceImpl::Close(const CloseCallback& callback) {
   CloseHandle();
   callback.Run();
@@ skipping 187 matching lines @@
   }
   device_handle_->IsochronousTransfer(
       USB_DIRECTION_OUTBOUND, endpoint_address, buffer, transfer_size,
       static_cast<uint32_t>(packets.size()), packet_size, timeout,
       base::Bind(&DeviceImpl::OnIsochronousTransferOut,
                  weak_factory_.GetWeakPtr(), callback));
 }
 
 }  // namespace usb
 }  // namespace device