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git log 8c855dba98eb..c84fad959284 --first-parent --oneline
2020-01-16 skia-flutter-autoroll@skia.org Roll src/third_party/skia 7edb0eb8a458..2900040bc4a0 (3 commits) (flutter/engine#15686)
2020-01-16 skia-flutter-autoroll@skia.org Roll src/third_party/dart 862d5012ae9c..515d4bd7adb1 (18 commits) (flutter/engine#15683)
2020-01-16 skia-flutter-autoroll@skia.org Roll src/third_party/skia 7655168e6865..7edb0eb8a458 (16 commits) (flutter/engine#15682)
2020-01-15 vsm@google.com [web] update dart:js and dart:js_util to new upstream locations (flutter/engine#15681)
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.mdDart SDK dependency
The bin/internal/engine.version file controls which version of the Flutter engine to use.
The file contains the commit hash of a commit in the https://github.com/flutter/engine repository.
That hash must have successfully been compiled on https://build.chromium.org/p/client.flutter/ and had its artifacts (the binaries that run on Android and iOS, the compiler, etc) successfully uploaded to Google Cloud Storage.
The /bin/internal/engine.merge_method file controls how we merge a pull
request created by the engine auto-roller. If it's squash, there's only one
commit for a pull request no matter how many engine commits there are inside
that pull request. If it's rebase, the number of commits in the framework is
equal to the number of engine commits in the pull request. The latter method
makes it easier to detect regressions but costs more test resources.