Roll src/third_party/freetype/src/ 7915fd51f..a632fb547 (5 commits)

https://chromium.googlesource.com/chromium/src/third_party/freetype2.git/+log/7915fd51f123..a632fb547e23

$ git log 7915fd51f..a632fb547 --date=short --no-merges --format='%ad %ae %s'
2018-06-24 wl [truetype] Increase precision while applying VF deltas.
2018-06-24 wl New base function `FT_Matrix_Check' (#54019).
2018-06-23 wl Fix typo.
2018-06-21 wl s/FT_PALETTE_USABLE_WITH_/FT_PALETTE_FOR_/.
2018-06-19 wl [sfnt] Fix CPAL heap buffer overflow.

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:1116
Bug: 856023
Change-Id: I89bc085502d7c823fec5c8b386c5d4b1d1ade3b2
Reviewed-on: https://chromium-review.googlesource.com/1113179
Commit-Queue: Ben Wagner <bungeman@chromium.org>
Reviewed-by: Ben Wagner <bungeman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570035}

DEPS

@@ -157,7 +157,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling freetype
   # and whatever else without interference from each other.
-  'freetype_revision': '7915fd51f123d0adbe6a0b9ad19eb941e1733c87',
+  'freetype_revision': 'a632fb547e23fe129a579fabf60a992fd7d98d02',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling HarfBuzz
   # and whatever else without interference from each other.

third_party/freetype/README.chromium

 Name: FreeType
 URL: http://www.freetype.org/
-Version: VER-2-9-1-97
-Revision: 7915fd51f123d0adbe6a0b9ad19eb941e1733c87
+Version: VER-2-9-1-102
+Revision: a632fb547e23fe129a579fabf60a992fd7d98d02
 License: Custom license "inspired by the BSD, Artistic, and IJG (Independent
          JPEG Group) licenses"
 License File: src/docs/FTL.TXT