Roll PDFium 03f5040..0213958

      https://pdfium.googlesource.com/pdfium.git/+log/03f5040..0213958

BUG=572871
TBR=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1563203002

Cr-Commit-Position: refs/heads/master@{#368045}