Convert device::UsbConfigDescriptor and friends to structs.

extensions/browser/api/usb/usb_api.h

 // Copyright 2014 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 EXTENSIONS_BROWSER_API_USB_USB_API_H_
 #define EXTENSIONS_BROWSER_API_USB_USB_API_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 150 matching lines @@
                               extensions::core_api::usb::Direction* output);
   bool ConvertSynchronizationTypeSafely(
       const device::UsbSynchronizationType& input,
       extensions::core_api::usb::SynchronizationType* output);
   bool ConvertTransferTypeSafely(
       const device::UsbTransferType& input,
       extensions::core_api::usb::TransferType* output);
   bool ConvertUsageTypeSafely(const device::UsbUsageType& input,
                               extensions::core_api::usb::UsageType* output);
 
-  scoped_ptr<base::ListValue> result_;
   scoped_ptr<extensions::core_api::usb::ListInterfaces::Params> parameters_;
 };
 
 class UsbCloseDeviceFunction : public UsbAsyncApiFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("usb.closeDevice", USB_CLOSEDEVICE)
 
   UsbCloseDeviceFunction();
 
  protected:
@@ skipping 131 matching lines @@
 
   virtual bool Prepare() OVERRIDE;
   virtual void AsyncWorkStart() OVERRIDE;
 
  private:
   scoped_ptr<extensions::core_api::usb::ResetDevice::Params> parameters_;
 };
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_USB_USB_API_H_