Roll PDFium 3485566..bd292ae

      https://pdfium.googlesource.com/pdfium.git/+log/3485566..bd292ae

BUG=576915,577030
TBR=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1585913002

Cr-Commit-Position: refs/heads/master@{#369429}