Track USB device configuration state in Blink.

device/usb/mojo/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/usb/mojo/device_impl.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <numeric>
@@ skipping 172 matching lines @@
   }
 }
 
 void DeviceImpl::OnOpen(const OpenCallback& callback,
                         scoped_refptr<UsbDeviceHandle> handle) {
   device_handle_ = handle;
   callback.Run(handle ? OpenDeviceError::OK : OpenDeviceError::ACCESS_DENIED);
 }
 
 void DeviceImpl::GetDeviceInfo(const GetDeviceInfoCallback& callback) {
+  const UsbConfigDescriptor* config = device_->GetActiveConfiguration();
+  device_info_->active_configuration = config ? config->configuration_value : 0;
   callback.Run(device_info_->Clone());
 }
 
-void DeviceImpl::GetConfiguration(const GetConfigurationCallback& callback) {
-  const UsbConfigDescriptor* config = device_->GetActiveConfiguration();
-  callback.Run(config ? config->configuration_value : 0);
-}
-
 void DeviceImpl::Open(const OpenCallback& callback) {
   if (device_handle_)
     callback.Run(OpenDeviceError::ALREADY_OPEN);
   else
     device_->Open(
         base::Bind(&DeviceImpl::OnOpen, weak_factory_.GetWeakPtr(), callback));
 }
 
 void DeviceImpl::Close(const CloseCallback& callback) {
   CloseHandle();
@@ skipping 215 matching lines @@
       base::Bind(&OnIsochronousTransferOut, base::Passed(&callback_ptr)));
 }
 
 void DeviceImpl::OnDeviceRemoved(scoped_refptr<UsbDevice> device) {
   DCHECK_EQ(device_, device);
   delete this;
 }
 
 }  // namespace usb
 }  // namespace device