tree 61d90fb3e49103c1fb696cdffe97899dc9b944c9
parent 19ebc120ca43812925aced193febbd32c000685c
author Lei Zhang <thestig@chromium.org> 1553537437 +0000
committer Chromium commit bot <commit-bot@chromium.org> 1553537437 +0000

Include <functional> in third_party/base/optional.h.

optional.h defines struct hash<base::Optional<T>>, and struct hash comes
from <functional>. This is the PDFium equivalent to
https://crrev.com/c/1536740

Change-Id: Ice770a13e29d132adacf21d64ea048750c2b7b9c
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/52291
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>