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After crrev.com/c/1262637 interstiitals will link to a different
support URL for Symantec errors, check against that one too in
ConnectionHelpTabHelper.

Change-Id: I1318534ad3db2235b1e8f5f383d7c69ad74db65c
Reviewed-on: https://chromium-review.googlesource.com/c/1265081Reviewed-by: Christopher Thompson <cthomp@chromium.org>
Commit-Queue: Carlos IL <carlosil@chromium.org>
Cr-Commit-Position: refs/heads/master@{#597250}