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

services/video_capture/device_media_to_mojo_adapter.h

Index: services/video_capture/device_media_to_mojo_adapter.h
diff --git a/services/video_capture/device_media_to_mojo_adapter.h b/services/video_capture/device_media_to_mojo_adapter.h
index dd3a712525fa91e0ba35e50161d667fea6e31c6f..e09e9c08b3c8f1213e0f8dfeb99e47fab7d1c79d 100644
--- a/services/video_capture/device_media_to_mojo_adapter.h
+++ b/services/video_capture/device_media_to_mojo_adapter.h
@@ -24,11 +24,17 @@ class DeviceMediaToMojoAdapter : public mojom::Device {
   // 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_;