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Previously, verdict_cache_manager is managed by services_delegate.
This is not a typical way of managing objects keyed by a profile.

In this CL, make verdict_cache_manager a child class of
keyed_service. Also introduce verdict_cache_manager_factory as a keyed
service factory to manage it.

Bug: 1058179,1057937
Change-Id: Ia43d05c3f05f597770e906b1c6e20e8626fc7021
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2085632Reviewed-by: Daniel Rubery <drubery@chromium.org>
Commit-Queue: Xinghui Lu <xinghuilu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#746858}