tree ebbbcc4090b08da4d7f41a1874cac5c39c012de3
parent ec9253c4add198df80521c933bb91af13945d5f8
author Terry Lucas <terry@google.com> 1558791531 -0700
committer dart-luci-ci-builder <dart-luci-ci-builder@dart-ci.iam.gserviceaccount.com> 1558791939 -0700

Use track-widget-creation transformer included in the sdk. (#9085)

This improves performance as the version in the SDK is able to work more
incrementally and avoids creating an expensive ClassHierarchy.
There is now no measureable performance difference with the option so the
kernel transformer can be enabled by default.
https://dart.googlesource.com/external/github.com/flutter/engine/+/651c90409ee7b8f43da7d1c60fcb172f1ad51901