4cdb3f2c3a
- When return type is not directly supported and just a Dart_Handle, automatically create persistent handles - Change `Dart_LoadLibrary` to `Dart_LookupLibrary` - switch from iostream to cstdio, I have no idea why, but it doesn't work for me in emulators and it's not a big difference. TEST=ci,manual Change-Id: I9b6539c7f16e81af9e8a9ab3995d6040bac64a1d Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/429962 Reviewed-by: Tess Strickland <sstrickl@google.com> Commit-Queue: Ivan Inozemtsev <iinozemtsev@google.com>