Roll engine 96fc607b8a54..7e68097cc1d3 (2 commits) (#45371)

git@github.com:flutter/engine.git/compare/96fc607b8a54...7e68097cc1d3

git log 96fc607b8a54..7e68097cc1d3 --no-merges --oneline
2019-11-21 ferhat@gmail.com [web] Fix line-height for Firefox (flutter/engine#13960)
2019-11-21 mouad.debbar@gmail.com [web] Allow users to enable canvas text measurement (flutter/engine#13929)


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 aaclarke@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

-96fc607b8a543c85da0682465da3a1978f192961
+7e68097cc1d35da8ced4b771d191b6d44c5d9fef