[Blob URLs] Split out possible BadMessage reasons in BlobURLStore.

For better debugability of unexpected ReportBadMessage calls.

Bug: 933089
Change-Id: Ib66d3187039345367df3bba27d539f44399a5692
Reviewed-on: https://chromium-review.googlesource.com/c/1477797
Reviewed-by: Daniel Murphy <dmurph@chromium.org>
Commit-Queue: Marijn Kruisselbrink <mek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#633498}
1 file changed