Remove iterator typedefs for USB descriptor types.

device/usb/usb_descriptors.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_DESCRIPTORS_H_
 #define DEVICE_USB_USB_DESCRIPTORS_H_
 
 #include <stdint.h>
 #include <vector>
 
@@ skipping 21 matching lines @@
 enum UsbUsageType {
   USB_USAGE_DATA = 0,
   USB_USAGE_FEEDBACK,
   USB_USAGE_EXPLICIT_FEEDBACK
 };
 
 struct UsbEndpointDescriptor {
   UsbEndpointDescriptor();
   ~UsbEndpointDescriptor();
 
-  typedef std::vector<UsbEndpointDescriptor>::const_iterator Iterator;
-
   uint8_t address;
   UsbEndpointDirection direction;
   uint16_t maximum_packet_size;
   UsbSynchronizationType synchronization_type;
   UsbTransferType transfer_type;
   UsbUsageType usage_type;
   uint16_t polling_interval;
   std::vector<uint8_t> extra_data;
 };
 
 struct UsbInterfaceDescriptor {
   UsbInterfaceDescriptor();
   ~UsbInterfaceDescriptor();
 
-  typedef std::vector<UsbInterfaceDescriptor>::const_iterator Iterator;
-
   uint8_t interface_number;
   uint8_t alternate_setting;
   uint8_t interface_class;
   uint8_t interface_subclass;
   uint8_t interface_protocol;
   std::vector<UsbEndpointDescriptor> endpoints;
   std::vector<uint8_t> extra_data;
 };
 
 struct UsbConfigDescriptor {
   UsbConfigDescriptor();
   ~UsbConfigDescriptor();
 
   uint8_t configuration_value;
   bool self_powered;
   bool remote_wakeup;
   uint16_t maximum_power;
   std::vector<UsbInterfaceDescriptor> interfaces;
   std::vector<uint8_t> extra_data;
 };
 
 }  // namespace device
 
 #endif  // DEVICE_USB_USB_DESCRIPTORS_H_