Roll external/skia a2272ef92..331ccfd8e (7 commits)
https://skia.googlesource.com/skia.git/+log/a2272ef92..331ccfd8e
2018-10-25 reed@google.com add textutils
2018-10-25 herb@google.com Remove use of unique glyphs from the SkGlyphRunBuilder
2018-10-25 herb@google.com Rename shuntGlyphIDs to glyphIDs
2018-10-25 herb@google.com Simplify calling for various glyph drawing.
2018-10-25 mtklein@google.com stub SkReadBuffer when SK_DISABLE_READBUFFER
2018-10-25 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader 4e3441943e60..1f3ef0d6d533 (1 commits)
2018-10-25 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 672267fcc74f..683bb0130ca2 (1 commits)
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Change-Id: I14cb9e91870802b9b252943433737bc0b8c4beb9
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