Merge to XFA: Cleanup: Remove CFFL_IFormFiller::GetCommitKey() that always returns 0.

Remove callers and related code that all just pass zeros around.

Also remove CFFL_IFormFiller::GetKeyDown().

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1149623012.

(cherry picked from commit 35c3163d55bebea8095474181f807ddfb2f4f806)

Review URL: https://codereview.chromium.org/1175083003.
12 files changed