Typemap device.usb.DeviceFilter to device::UsbDeviceFilter.

device/usb/public/interfaces/device_manager_struct_traits.h

+// Copyright 2017 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_PUBLIC_INTERFACES_DEVICE_MANAGER_STRUCT_TRAITS_H_
+#define DEVICE_USB_PUBLIC_INTERFACES_DEVICE_MANAGER_STRUCT_TRAITS_H_
+
+#include "device/usb/public/interfaces/device_manager.mojom.h"
+#include "device/usb/usb_device_filter.h"
+
+namespace mojo {
+
+template <>
+struct StructTraits<device::usb::DeviceFilterDataView,
+                    device::UsbDeviceFilter> {
+  static bool has_vendor_id(const device::UsbDeviceFilter& filter) {
+    return filter.vendor_id.has_value();
+  }
+
+  static uint16_t vendor_id(const device::UsbDeviceFilter& filter) {
+    return filter.vendor_id.value_or(0);
+  }
+
+  static bool has_product_id(const device::UsbDeviceFilter& filter) {
+    return filter.product_id.has_value();
+  }
+
+  static uint16_t product_id(const device::UsbDeviceFilter& filter) {
+    return filter.product_id.value_or(0);
+  }
+
+  static bool has_class_code(const device::UsbDeviceFilter& filter) {
+    return filter.interface_class.has_value();
+  }
+
+  static uint8_t class_code(const device::UsbDeviceFilter& filter) {
+    return filter.interface_class.value_or(0);
+  }
+
+  static bool has_subclass_code(const device::UsbDeviceFilter& filter) {
+    return filter.interface_subclass.has_value();
+  }
+
+  static uint8_t subclass_code(const device::UsbDeviceFilter& filter) {
+    return filter.interface_subclass.value_or(0);
+  }
+
+  static bool has_protocol_code(const device::UsbDeviceFilter& filter) {
+    return filter.interface_protocol.has_value();
+  }
+
+  static uint8_t protocol_code(const device::UsbDeviceFilter& filter) {
+    return filter.interface_protocol.value_or(0);
+  }
+
+  static bool Read(device::usb::DeviceFilterDataView input,
+                   device::UsbDeviceFilter* output) {

[juncai, 2017/01/12 00:50:23]

nit: move this function to .cpp file?

[Reilly Grant (use Gerrit), 2017/01/12 02:18:44]

Done.

+    if (input.has_vendor_id())
+      output->vendor_id = input.vendor_id();
+    if (input.has_product_id())
+      output->product_id = input.product_id();
+    if (input.has_class_code())
+      output->interface_class = input.class_code();
+    if (input.has_subclass_code())
+      output->interface_subclass = input.subclass_code();
+    if (input.has_protocol_code())
+      output->interface_protocol = input.protocol_code();
+    return true;
+  }
+};
+
+}  // namespace mojo
+
+#endif  // DEVICE_USB_PUBLIC_INTERFACES_DEVICE_MANAGER_STRUCT_TRAITS_H_