[Mojo Video Capture] Implement a VideoCaptureProvider using the Mojo service (part 2)

content/browser/renderer_host/media/service_video_capture_device_launcher.h

Index: content/browser/renderer_host/media/service_video_capture_device_launcher.h
diff --git a/content/browser/renderer_host/media/service_video_capture_device_launcher.h b/content/browser/renderer_host/media/service_video_capture_device_launcher.h
index 6ef20ee68cde712f041ae77632f4ce3afb108ca6..31f1c21d3a12bfca15ce8db011390f0f5394ea37 100644
--- a/content/browser/renderer_host/media/service_video_capture_device_launcher.h
+++ b/content/browser/renderer_host/media/service_video_capture_device_launcher.h
@@ -31,7 +31,23 @@ class ServiceVideoCaptureDeviceLauncher : public VideoCaptureDeviceLauncher {
   void OnUtilizationReport(int frame_feedback_id, double utilization);
 
  private:
+  enum class State {
+    READY_TO_LAUNCH,
+    DEVICE_START_IN_PROGRESS,
+    DEVICE_START_ABORTING
+  };
+
+  void OnCreateDeviceCallback(
+      const media::VideoCaptureParams& params,
+      video_capture::mojom::DevicePtr device,
+      base::WeakPtr<media::VideoFrameReceiver> receiver,
+      Callbacks* callbacks,
+      base::OnceClosure done_cb,
+      video_capture::mojom::DeviceAccessResultCode result_code);
+
   video_capture::mojom::DeviceFactoryPtr* const device_factory_;
+  State state_;
+  base::SequenceChecker sequence_checker_;
 };
 
 }  // namespace content