GitLab

These were fixed for standalone PDFium at
  https://pdfium-review.googlesource.com/c/pdfium/+/73015

but still persist in Chromium's version of /.gn

Change-Id: I57fa0250a5a668935978988d949311d86f9bc244
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2640922Reviewed-by: Erik Staab <estaab@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#845390}