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It's okay to pass nullptr to delete, as by default it will call free()
that will check for NULL, so there's no need for redundant checks.

Bug: none
Change-Id: I450ee684f78d0cf3f1394d18de788df67f6435c9
Reviewed-on: https://chromium-review.googlesource.com/988960Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Andre Goddard Rosa <andre.rosa@lge.com>
Cr-Commit-Position: refs/heads/master@{#547556}