Replace libusb in the Linux/Chrome OS USB I/O path.

device/usb/usb_device_handle.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 DEVICE_USB_USB_DEVICE_HANDLE_H_
 #define DEVICE_USB_USB_DEVICE_HANDLE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 102 matching lines @@
 
   // Gets the interface containing |endpoint_address|. Returns nullptr if no
   // claimed interface contains that endpoint.
   virtual const UsbInterfaceDescriptor* FindInterfaceByEndpoint(
       uint8_t endpoint_address) = 0;
 
  protected:
   friend class base::RefCountedThreadSafe<UsbDeviceHandle>;
 
   UsbDeviceHandle();
-
   virtual ~UsbDeviceHandle();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(UsbDeviceHandle);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_USB_USB_DEVICE_HANDLE_H_