[USS] Fix a hack for populating missing wallet_data client tags

This CL deals properly with the root node for wallet data. This node
is sent (at least) in integration tests for migration to USS.

Bug: 853688
Change-Id: I94f38e38a4f7db7a7e960e5205c64d7ad6cf49e7
Reviewed-on: https://chromium-review.googlesource.com/1238541
Commit-Queue: Jan Krcal <jkrcal@chromium.org>
Reviewed-by: Mohamed Amir Yosef <mamir@chromium.org>
Cr-Commit-Position: refs/heads/master@{#593188}
1 file changed