4b858b95f8
This effectively enables ES6 language features in Dart2JS by default. Also adapts some tests to expect ES6 Method Definition syntax. Change-Id: Iec36fbf9d22afd1083f7560a16fa73fbf15fb85c Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/205741 Commit-Queue: Mark Zhou <markzipan@google.com> Reviewed-by: Sigmund Cherem <sigmund@google.com> Reviewed-by: Joshua Litt <joshualitt@google.com>