[Mojo Video Capture] Switch to using Mojo structs in media/capture/mojo

services/video_capture/public/interfaces/device_descriptor.mojom

-// Copyright 2016 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 video_capture.mojom;
-
-enum VideoCaptureApi {
-  LINUX_V4L2_SINGLE_PLANE,
-  WIN_MEDIA_FOUNDATION,
-  WIN_DIRECT_SHOW,
-  MACOSX_AVFOUNDATION,
-  MACOSX_DECKLINK,
-  ANDROID_API1,
-  ANDROID_API2_LEGACY,
-  ANDROID_API2_FULL,
-  ANDROID_API2_LIMITED,
-  ANDROID_TANGO,
-  UNKNOWN
-};
-
-enum VideoCaptureTransportType {
-  // For MACOSX_AVFOUNDATION Api, identifies devices that are built-in or USB.
-  MACOSX_USB_OR_BUILT_IN,
-  OTHER_TRANSPORT
-};
-
-struct DeviceDescriptor {
-  string display_name;
-  string device_id;
-  string model_id;
-  VideoCaptureApi capture_api;
-  VideoCaptureTransportType transport_type;
-};