The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/53ef659fc716f813574d173e44559f830ec586f4

commit 53ef659fc716f813574d173e44559f830ec586f4
Author: Dominik Röttsches <drott@chromium.org>
Date: Wed Feb 21 15:03:51 2018

Roll HarfBuzz to 1.7.5 plus 0c66043a..0bff6991

Cherry pick the latest hb_set improvements and optimizations to check
those against Chromium.

Bug:  813634 
Change-Id: Idaba87ebf0811c6add23bc06737d94c0957cf3c3
Reviewed-on: https://chromium-review.googlesource.com/925521
Reviewed-by: Koji Ishii <kojii@chromium.org>
Commit-Queue: Dominik Röttsches <drott@chromium.org>
Cr-Commit-Position: refs/heads/master@{#538103}
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/BUILD.gn
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/NEWS
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/README.chromium
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-atomic-private.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-blob.cc
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-blob.h
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-buffer-deserialize-json.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-buffer-deserialize-text.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-buffer-private.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-buffer-serialize.cc
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-buffer.cc
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-buffer.h
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-common.cc
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-coretext.cc
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-debug.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-face.cc
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-face.h
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-font-private.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-font.h
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ft.cc
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-gobject-structs.h
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-graphite2.cc
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-open-file-private.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-open-type-private.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-cbdt-table.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-cmap-table.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-glyf-table.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-head-table.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-hhea-table.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-hmtx-table.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-kern-table.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-layout-common-private.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-layout-gdef-table.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-layout-gpos-table.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-layout-gsub-table.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-layout-gsubgpos-private.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-layout-private.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-layout.cc
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-map-private.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-map.cc
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-math-table.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-maxp-table.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-name-table.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-os2-table.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-post-table.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-shape-complex-arabic-fallback.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-shape-complex-arabic.cc
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-shape-complex-indic-machine.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-shape-complex-indic-private.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-shape-complex-indic-table.cc
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-shape-complex-indic.cc
[add] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-shape-complex-khmer-machine.hh
[add] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-shape-complex-khmer-private.hh
[add] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-shape-complex-khmer.cc
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-shape-complex-myanmar-machine.hh
[add] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-shape-complex-myanmar-private.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-shape-complex-myanmar.cc
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-shape-complex-private.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-shape-complex-use-machine.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-shape-complex-use-private.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-shape-complex-use-table.cc
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-shape-complex-use.cc
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-shape-fallback.cc
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-shape-normalize.cc
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-shape.cc
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-var-avar-table.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-var-fvar-table.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-var-hvar-table.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-ot-var-mvar-table.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-private.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-set-private.hh
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-set.cc
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-set.h
[add] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-subset-plan.hh
[add] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-subset.h
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/hb-version.h
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/main.cc
[modify] https://crrev.com/53ef659fc716f813574d173e44559f830ec586f4/third_party/harfbuzz-ng/src/test-buffer-serialize.cc