Open offline page instead of download home when clicking OPEN button on snackbar
When download snackbar shows up, clicking the open button will open
download home for offline page.
This CL corrects that behavior so that the corresponding offline page
will be opened.
BUG=
641304
Committed:
https://crrev.com/c17248a3ba1ac0e454b7b59a35d613a4cdf8e532
Cr-Commit-Position: refs/heads/master@{#414760}