Update ad-block DEPS for not wrongly blocking blob: URLs

[bbondy]

Fix brave/brave-browser#428
Which is this fix: brave-experiments/ad-block@fa3cd87

Auditors: @emerick

Submitter Checklist:

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Ran git rebase -i to squash commits (if needed).
• Tagged reviewers and labelled the pull request as needed.
• Request a security/privacy review as needed.

Test Plan:

Reviewer Checklist:

• New files have MPL-2.0 license header.
• Request a security/privacy review as needed.
• Adequate test coverage exists to prevent regressions

[emerick]

LGTM

[bsclifton]

@bbondy should this be pulled into browser-laptop too?

[bbondy]

Thanks for checking. No it's not needed @bsclifton because we only consider http and https URLs there.