Revert of Build a basic Mojo service framework for device/usb

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";
-
-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;
-};
-
-// TODO(rockot): Remove this wrapper struct. Mojom bindings do not yet support
-// arrays of interfaces.
-struct EnumerationResult {
-  Device device;
-};
-
-interface DeviceManager {
-  GetDevices(EnumerationOptions options) => (array<EnumerationResult> results);
-};