pw_web: Make ongoing transfers accessible downstream

Change-Id: I132482c570f4a5c6a254bfd221f001e34f525a26
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/174231
Pigweed-Auto-Submit: Asad Memon <asadmemon@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed-service-accounts.iam.gserviceaccount.com>
Reviewed-by: Anthony DiGirolamo <tonymd@google.com>
diff --git a/pw_transfer/ts/client.ts b/pw_transfer/ts/client.ts
index 7a8290e..79f397d 100644
--- a/pw_transfer/ts/client.ts
+++ b/pw_transfer/ts/client.ts
@@ -49,8 +49,8 @@
  */
 export class Manager {
   // Ongoing transfers in the service by ID
-  private readTransfers: TransferDict = {};
-  private writeTransfers: TransferDict = {};
+  readTransfers: TransferDict = {};
+  writeTransfers: TransferDict = {};
 
   // RPC streams for read and write transfers. These are shareable by
   // multiple transfers of the same type.