tree aca8e46202f2d00c3d4ed82bd981dffeb781d6fc
parent 73160bc40d5bdb222d9f1def8b67cb22a6d99765
author Elliott Brooks <elliottbrooks@google.com> 1688164691 +0000
committer Commit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com> 1688164691 +0000

Support the dart:developer timeline APIs in dart2js and DDC.

Exposes timeline events in the Chrome DevTools performance panel using the  Web APIs performance.mark() and performance.measure(): https://developer.mozilla.org/en-US/docs/Web/API/Performance

CoreLibraryReviewExempt: Only change in sdk/lib is updating a comment.
Bug: https://github.com/flutter/devtools/issues/4652
Change-Id: I4f934bcffeb2920ffaf9b7b3a67fc5fc3b814294
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/310974
Reviewed-by: Stephen Adams <sra@google.com>
Commit-Queue: Elliott Brooks <elliottbrooks@google.com>