Roll src/third_party/freetype/src/ dfddc2d97..abd997aa7 (9 commits)

https://chromium.googlesource.com/chromium/src/third_party/freetype2.git/+log/dfddc2d97596..abd997aa7cf2

$ git log dfddc2d97..abd997aa7 --date=short --no-merges --format='%ad %ae %s'
2018-09-21 wl Improve documentation of `FT_LOAD_NO_RECURSE'.
2018-09-21 bungeman Improve auto-hinter handling of bitmap fonts (#54681).
2018-09-21 wl [raster] Fix disappearing vertical lines (#54589).
2018-09-21 wl [base] Some comments.
2018-09-20 apodtele * src/base/ftobjs.c (ft_glyphslot_reset_bimap): Tiny rounding tweak.
2018-09-20 apodtele [pcf] Replace charmap implementation.
2018-09-20 wl [base] Remove unused function `FT_GlyphLoader_CopyPoints'.
2018-09-19 apodtele [pcf] Prepare to replace charmap implementation.
2018-09-18 apodtele Remove unused fields.

Created with:
  roll-dep src/third_party/freetype/src
R=bungeman@chromium.org,drott@chromium.org

CQ_INCLUDE_TRYBOTS=luci.chromium.try:linux_chromium_msan_rel_ng

PDFium-Issue: pdfium:1159
Change-Id: I5640bef8565d2ce1eb1b199245fee8e4e979873c
Reviewed-on: https://chromium-review.googlesource.com/1238775
Reviewed-by: Dominik Röttsches <drott@chromium.org>
Commit-Queue: Dominik Röttsches <drott@chromium.org>
Cr-Commit-Position: refs/heads/master@{#593455}
2 files changed