[Mojo Video Capture] Adapt video_capture service to refactored video capture stack

services/video_capture/device_media_to_mojo_adapter.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_DEVICE_MEDIA_TO_MOJO_ADAPTER_H_
 #define SERVICES_VIDEO_CAPTURE_DEVICE_MEDIA_TO_MOJO_ADAPTER_H_
 
 #include "media/capture/video/video_capture_device.h"
 #include "media/capture/video/video_capture_device_client.h"
 #include "media/capture/video_capture_types.h"
 #include "services/video_capture/public/interfaces/device.mojom.h"
 
 namespace video_capture {
 
 // Implementation of mojom::Device backed by a given instance of
 // media::VideoCaptureDevice.
 class DeviceMediaToMojoAdapter : public mojom::Device {
  public:
   DeviceMediaToMojoAdapter(std::unique_ptr<media::VideoCaptureDevice> device,
                            const media::VideoCaptureJpegDecoderFactoryCB&
                                jpeg_decoder_factory_callback);
   ~DeviceMediaToMojoAdapter() override;
 
   // mojom::Device:
   void Start(const media::VideoCaptureParams& requested_settings,
              mojom::ReceiverPtr receiver) override;
+  void OnReceiverReportingUtilization(int32_t frame_feedback_id,
+                                      double utilization) override;
 
   void Stop();
 
   void OnClientConnectionErrorOrClose();
 
+  // Returns the fixed maximum number of buffers passed to the constructor
+  // of VideoCaptureBufferPoolImpl.
+  static int max_buffer_pool_buffer_count();
+
  private:
   const std::unique_ptr<media::VideoCaptureDevice> device_;
   media::VideoCaptureJpegDecoderFactoryCB jpeg_decoder_factory_callback_;
   bool device_running_;
 };
 
 }  // namespace video_capture
 
 #endif  // SERVICES_VIDEO_CAPTURE_DEVICE_MEDIA_TO_MOJO_ADAPTER_H_