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This method will be used to gracefully handle SSL errors when WebState
is not in a tab.

Bug: None
Change-Id: Iee02ce69deda84d595e6bd5ab815317afb82f12d
Reviewed-on: https://chromium-review.googlesource.com/683464
Commit-Queue: Eugene But <eugenebut@chromium.org>
Reviewed-by: Olivier Robin <olivierrobin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#504472}