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When replacing an AXObject with a different type of object, and keeping
the same id, we don't want to remove it from the relation cache, is its
relations are still the same.

In addition, make sure that AXIDs that are removed are removed from
all relevant maps, so that the condition cannot occur where an AXID
is removed from an owner children map, but is still tracked by
the owner, thus its owned children do not think they are owned.

The best failing test for this is in CL:2585685 which turns on
accessibility for all browser tests, via
browser_tests --gtest_filter="HistoryListTest.*".

Bug: 1153576,1156936
Change-Id: I0bb4d38f78b343bd34d2e42e1cf695fcfd99460e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2584610
Commit-Queue: Aaron Leventhal <aleventhal@chromium.org>
Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#836772}