8c855dba9 fix text blurriness in HTML-rendered text (flutter/engine#15649) (#48942)

https://github.com/flutter/engine/compare/09d892b3bf5d...8c855dba98eb

git log 09d892b3bf5d..8c855dba98eb --first-parent --oneline
2020-01-15 yjbanov@google.com fix text blurriness in HTML-rendered text (flutter/engine#15649)


If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC jimgraham@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

bin/internal/engine.version

-09d892b3bf5d24a6d7b942586203cc57d226dbf1
+8c855dba98eb041c0dca196566448e0498535499