Add initial Controller to DownloadService

components/download/internal/config.h

Index: components/download/internal/config.h
diff --git a/components/download/internal/config.h b/components/download/internal/config.h
index c5b3b0d44d30a1cdfe17b5fc800b52f4adbbd64f..6dc23f17f909dc3fbdbd761f4e58f580b2913776 100644
--- a/components/download/internal/config.h
+++ b/components/download/internal/config.h
@@ -39,18 +39,18 @@ struct Configuration {
 
   // The maximum number of downloads the DownloadService can have currently in
   // Active or Paused states.
-  int max_concurrent_downloads;
+  uint32_t max_concurrent_downloads;
 
   // The maximum number of downloads the DownloadService can have currently in
   // only Active state.
-  int max_running_downloads;
+  uint32_t max_running_downloads;
 
   // The maximum number of downloads that are scheduled but not yet in Active
   // state, for each client using the download service.
-  int max_scheduled_downloads;
+  uint32_t max_scheduled_downloads;
 
   // The maximum number of retries before the download is aborted.
-  int max_retry_count;
+  uint32_t max_retry_count;
 
   // The time that the download service will keep the files around before
   // deleting them if the client hasn't handle the files.