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These tests were previously using the fake permission manager which
always grants permissions. Now we can use the real permission manager,
and the fake permission manager can be removed.

Fixes a strict mode violation in permission dialogs (similar to fixes
from https://crrev.com/c/2108603).

Bug: 1025625, 1025609
Change-Id: I8b756c61ee213151e53d68a375ffa4d3f8fd7643
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2111061
Commit-Queue: Clark DuVall <cduvall@chromium.org>
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Cr-Commit-Position: refs/heads/master@{#752494}