Revert of Update device/usb and its Mojo interface for variable size ISO packets.

device/devices_app/usb/type_converters.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_DEVICES_APP_USB_TYPE_CONVERTERS_H_
 #define DEVICE_DEVICES_APP_USB_TYPE_CONVERTERS_H_
 
 #include <vector>
 
 #include "device/devices_app/usb/public/interfaces/device.mojom.h"
 #include "device/devices_app/usb/public/interfaces/device_manager.mojom.h"
 #include "device/usb/usb_descriptors.h"
 #include "device/usb/usb_device_filter.h"
 #include "device/usb/usb_device_handle.h"
 #include "device/usb/webusb_descriptors.h"
 #include "mojo/public/cpp/bindings/array.h"
 #include "mojo/public/cpp/bindings/type_converter.h"
 
-// Type converters to translate between internal device/usb data types and
-// public Mojo interface data types. This must be included by any source file
-// that uses these conversions explicitly or implicitly.
+// Type converters to convert objects between internal device/usb data types and
+// public Mojo interface data types.
 
 namespace device {
 class UsbDevice;
 }
 
 namespace mojo {
 
 template <>
 struct TypeConverter<device::UsbDeviceFilter, device::usb::DeviceFilterPtr> {
   static device::UsbDeviceFilter Convert(
@@ skipping 83 matching lines @@
                      device::WebUsbAllowedOrigins> {
   static device::usb::WebUsbDescriptorSetPtr Convert(
       const device::WebUsbAllowedOrigins& allowed_origins);
 };
 
 template <>
 struct TypeConverter<device::usb::DeviceInfoPtr, device::UsbDevice> {
   static device::usb::DeviceInfoPtr Convert(const device::UsbDevice& device);
 };
 
-template <>
-struct TypeConverter<device::usb::IsochronousPacketPtr,
-                     device::UsbDeviceHandle::IsochronousPacket> {
-  static device::usb::IsochronousPacketPtr Convert(
-      const device::UsbDeviceHandle::IsochronousPacket& packet);
-};
-
 }  // namespace mojo
 
 #endif  // DEVICE_DEVICES_APP_USB_TYPE_CONVERTERS_H_