Roll src/third_party/harfbuzz-ng/src/ 7cde68f10..64a45be51 (4 commits)

https://chromium.googlesource.com/external/github.com/harfbuzz/harfbuzz.git/+log/7cde68f10cdf..64a45be5198f

$ git log 7cde68f10..64a45be51 --date=short --no-merges --format='%ad %ae %s'
2019-11-09 ebrahim [ubsan] Don't decrease pointer if match_glyph_data is null (#2048)
2019-11-05 don.j.olmstead [cmake] Add harfbuzz-icu library
2019-11-06 ebrahim [fuzz] Remove just added case
2019-11-05 ebrahim [fuzz] Upload testcase of https://crbug.com/oss-fuzz/18529

Created with:
  roll-dep src/third_party/harfbuzz-ng/src

TBR=bashi@chromium.org,behdad@chromium.org,bungeman@chromium.org,drott@chromium.org,eae@chromium.org,jshin@chromium.org

Bug: 1023070
Change-Id: I9bc02abe3f177adfd8afe6eb439fb47d68158ce1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1910222Reviewed-by: Dominik Röttsches <drott@chromium.org>
Reviewed-by: Ben Wagner <bungeman@chromium.org>
Commit-Queue: Dominik Röttsches <drott@chromium.org>
Cr-Commit-Position: refs/heads/master@{#714266}

DEPS

@@ -223,7 +223,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling HarfBuzz
   # and whatever else without interference from each other.
-  'harfbuzz_revision': '7cde68f10cdf2c3ff77c1d9077475c0fc034c75c',
+  'harfbuzz_revision': '64a45be5198f6e22c91454bda7bd9a9294552dff',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Emoji Segmenter
   # and whatever else without interference from each other.

third_party/harfbuzz-ng/README.chromium

 Name: harfbuzz-ng
 Short Name: harfbuzz-ng
 URL: http://harfbuzz.org
-Version: 2.6.4-5
-Date: 20191104
-Revision: 7cde68f10cdf2c3ff77c1d9077475c0fc034c75c
+Version: 2.6.4-9
+Date: 20191111
+Revision: 64a45be5198f6e22c91454bda7bd9a9294552dff
 Security Critical: yes
 License: MIT
 License File: src/COPYING