Reland: Introduce the devices Mojo app

device/usb/public/interfaces/device_manager.mojom

-// 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.
-
-module device.usb;
-
-import "device.mojom";
-
-enum OpenDeviceError {
-  // Opening the device succeeded.
-  OK,
-
-  // The device could not be opened because the request GUID is unknown.
-  NOT_FOUND,
-
-  // The operating system denied access to the device.
-  ACCESS_DENIED,
-};
-
-struct DeviceFilter {
-  bool has_vendor_id;
-  uint16 vendor_id;
-
-  bool has_product_id;
-  uint16 product_id;
-
-  bool has_class_code;
-  uint8 class_code;
-
-  bool has_subclass_code;
-  uint8 subclass_code;
-
-  bool has_protocol_code;
-  uint8 protocol_code;
-};
-
-struct EnumerationOptions {
-  array<DeviceFilter> filters;
-};
-
-interface DeviceManager {
-  // Retrieves information about all devices available to the DeviceManager
-  // implementation.
-  GetDevices(EnumerationOptions options) => (array<DeviceInfo> results);
-
-  // Attempts to open a device given its GUID.
-  OpenDevice(string guid, Device& device_request) => (OpenDeviceError error);
-};