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This removes the PermissionManagerFactory dependency from
WebsitePreferenceBridge.

Bug: 1058600
Change-Id: I474a8a40e178ee1cc79f3a0454617e9b12a8d789
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2110671Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Clark DuVall <cduvall@chromium.org>
Commit-Queue: Evan Stade <estade@chromium.org>
Cr-Commit-Position: refs/heads/master@{#751831}