Merge to XFA: Cleanup: Remove dead formfiller code.

TBR=jam@chromium.org
Review URL: https://codereview.chromium.org/1196853002 .

(cherry picked from commit f2d3911ce1a07812d75e7671e038d0922a823528)

Review URL: https://codereview.chromium.org/1280883003 .
10 files changed