Merge to XFA: Kill FX_HFILE

(cherry picked from commit c8eeed31f217d99a706b0cbf5e4ce0bcc12beb64)
Review URL: https://codereview.chromium.org/1259123008 .

R=thestig@chromium.org

Review URL: https://codereview.chromium.org/1256103006 .
2 files changed