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This CL removes icons that are no longer supported. It also updates
some icons and add a new safety_check icon.

Bug: 1078782
Change-Id: I5ad94555379d850f53190185b997f6115dfd5c3b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2340965Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Commit-Queue: Ewann Pellé <ewannpv@chromium.org>
Cr-Commit-Position: refs/heads/master@{#795839}