eb139936e [web] Fix right click issues (flutter/engine#15103) (#48143)

https://github.com/flutter/engine/compare/5858519139c2...eb139936eb2c

git log 5858519139c2..eb139936eb2c --first-parent --oneline
2020-01-03 mouad.debbar@gmail.com [web] Fix right click issues (flutter/engine#15103)


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 franciscojma@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

-5858519139c22484aaff1cf5b26bdf7951259344
+eb139936eb2c17694aba3fd922adfe8a85c5e8df