Update bug434 for CFDE_TextEditEngine changes.

The position of the u in the second null has shifted over one pixel to
the left.

Change-Id: I01e1b048d37024d7e156cde6f225b86822ad6af8
Reviewed-on: https://pdfium-review.googlesource.com/12310
Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>