Track USB device configuration state in Blink.

device/usb/mojo/device_impl.h

 // 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.
 
 #ifndef DEVICE_USB_MOJO_DEVICE_IMPL_H_
 #define DEVICE_USB_MOJO_DEVICE_IMPL_H_
 
 #include <stdint.h>
 
 #include "base/callback_forward.h"
@@ skipping 37 matching lines @@
   // Checks interface permissions for control transfers.
   bool HasControlTransferPermission(ControlTransferRecipient recipient,
                                     uint16_t index);
 
   // Handles completion of an open request.
   void OnOpen(const OpenCallback& callback,
               scoped_refptr<device::UsbDeviceHandle> handle);
 
   // Device implementation:
   void GetDeviceInfo(const GetDeviceInfoCallback& callback) override;
-  void GetConfiguration(const GetConfigurationCallback& callback) override;
   void Open(const OpenCallback& callback) override;
   void Close(const CloseCallback& callback) override;
   void SetConfiguration(uint8_t value,
                         const SetConfigurationCallback& callback) override;
   void ClaimInterface(uint8_t interface_number,
                       const ClaimInterfaceCallback& callback) override;
   void ReleaseInterface(uint8_t interface_number,
                         const ReleaseInterfaceCallback& callback) override;
   void SetInterfaceAlternateSetting(
       uint8_t interface_number,
@@ skipping 44 matching lines @@
   mojo::Binding<Device> binding_;
   base::WeakPtrFactory<DeviceImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DeviceImpl);
 };
 
 }  // namespace usb
 }  // namespace device
 
 #endif  // DEVICE_USB_MOJO_DEVICE_IMPL_H_