Use Mojo enum types in the C++ USB interface

device/usb/mojo/type_converters.h

Index: device/usb/mojo/type_converters.h
diff --git a/device/usb/mojo/type_converters.h b/device/usb/mojo/type_converters.h
index 4cee02ce8f6b5656ad50f9504298b17c0979d7a5..cb9514c1301c8014e5f14b7477015e478bd749a9 100644
--- a/device/usb/mojo/type_converters.h
+++ b/device/usb/mojo/type_converters.h
@@ -25,40 +25,6 @@ class UsbDevice;
 namespace mojo {
 
 template <>
-struct TypeConverter<device::mojom::UsbTransferDirection,
-                     device::UsbEndpointDirection> {
-  static device::mojom::UsbTransferDirection Convert(
-      const device::UsbEndpointDirection& direction);
-};
-
-template <>
-struct TypeConverter<device::mojom::UsbTransferStatus,
-                     device::UsbTransferStatus> {
-  static device::mojom::UsbTransferStatus Convert(
-      const device::UsbTransferStatus& status);
-};
-
-template <>
-struct TypeConverter<device::UsbDeviceHandle::TransferRequestType,
-                     device::mojom::UsbControlTransferType> {
-  static device::UsbDeviceHandle::TransferRequestType Convert(
-      const device::mojom::UsbControlTransferType& type);
-};
-
-template <>
-struct TypeConverter<device::UsbDeviceHandle::TransferRecipient,
-                     device::mojom::UsbControlTransferRecipient> {
-  static device::UsbDeviceHandle::TransferRecipient Convert(
-      const device::mojom::UsbControlTransferRecipient& recipient);
-};
-
-template <>
-struct TypeConverter<device::mojom::UsbEndpointType, device::UsbTransferType> {
-  static device::mojom::UsbEndpointType Convert(
-      const device::UsbTransferType& type);
-};
-
-template <>
 struct TypeConverter<device::mojom::UsbEndpointInfoPtr,
                      device::UsbEndpointDescriptor> {
   static device::mojom::UsbEndpointInfoPtr Convert(