Remove unused code from GlobalWebStateObserver.

Bug: 782269
Change-Id: I02e842c5d19710a3a7368d0da139dd1844100ddf
Reviewed-on: https://chromium-review.googlesource.com/c/1400957
Commit-Queue: Sylvain Defresne <sdefresne@chromium.org>
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Cr-Commit-Position: refs/heads/master@{#621083}
4 files changed