GitLab

The WebBlobInfo instances already contain all the BlobDataHandles, so
no reason to store both.

Bug: none
Change-Id: I308c790040af3cd7efea9fdd20520a4ded05a797
Reviewed-on: https://chromium-review.googlesource.com/884374
Commit-Queue: Marijn Kruisselbrink <mek@chromium.org>
Reviewed-by: Victor Costan <pwnall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#532187}