Roll src/third_party/harfbuzz-ng/src/ 97b926857..659eeddb2 (11 commits)

https://chromium.googlesource.com/external/github.com/harfbuzz/harfbuzz.git/+log/97b926857759..659eeddb2df5

$ git log 97b926857..659eeddb2 --date=short --no-merges --format='%ad %ae %s'
2019-06-03 bruce.mitchener Use C++11 override keyword.
2019-06-01 corbett.dav [myanmar] Make medial_group match the OT spec
2019-05-29 qxliu [subset] Hmtx/vmtx tables to use subset2 and new iterator frameworks
2019-06-03 ariza added parentheses to FDSelect::sanitize as well
2019-06-03 ariza added test data
2019-06-03 ariza parenthesized cond-exp in CFF2FDSelect::sanitize
2019-06-03 ebrahim Reapply possible bsearch overflow fix
2019-06-03 bruce.mitchener test: Use nullptr in C++ code. (#1744)
2019-06-02 ebrahim [ci] revert to xenial
2019-06-02 ebrahim minor
2019-06-02 ebrahim Use a unified bsearch (#1741)

Created with:
  roll-dep src/third_party/harfbuzz-ng/src
R=bashi@chromium.org,behdad@chromium.org,bungeman@chromium.org,drott@chromium.org,eae@chromium.org,jshin@chromium.org

Bug: 969261
Tbr: bungeman, eae
Change-Id: Ib7c0a4cc9fec1d8f390a8d41dc5cb2ff2b0ffdd1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1645212Reviewed-by: Dominik Röttsches <drott@chromium.org>
Commit-Queue: Dominik Röttsches <drott@chromium.org>
Cr-Commit-Position: refs/heads/master@{#666235}

DEPS

@@ -193,7 +193,7 @@ 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': '97b92685775983a280f335423263a6a8d82c3941',
+  'harfbuzz_revision': '659eeddb2df5b97cc01bd39e106381f65c9f41f1',
   # 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: 2.5.1-3
-Date: 20190603
-Revision: 97b92685775983a280f335423263a6a8d82c3941
+Version: 2.5.1-15
+Date: 20190605
+Revision: 659eeddb2df5b97cc01bd39e106381f65c9f41f1
 Security Critical: yes
 License: MIT
 License File: src/COPYING