Video Capture Mojo (1.4a.a): Add service configurator interface

services/video_capture/video_capture_device_impl.h

 // 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.
 
 #ifndef SERVICES_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_IMPL_H_
 #define SERVICES_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_IMPL_H_
 
 #include "services/video_capture/public/interfaces/video_capture_device.mojom.h"
 
 namespace video_capture {
 
-// Implementation of the VideoCaptureDevice Mojo interface.
+// Implementation of mojom::VideoCaptureDeviceProxy backed by a given instance
+// of media::VideoCaptureDevice.
 class VideoCaptureDeviceImpl : public mojom::VideoCaptureDevice {
  public:
-  // mojom::VideoCaptureDevice:
+  // mojom::VideoCaptureDeviceProxy:
   void Start(mojom::VideoCaptureFormatPtr requested_format,
              mojom::ResolutionChangePolicy resolution_change_policy,
              mojom::PowerLineFrequency power_line_frequency,
              mojom::VideoCaptureDeviceClientPtr client) override;
 };
 
 }  // namespace video_capture
 
 #endif  // SERVICES_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_IMPL_H_