This change fixes the issues causing build failures when using the
forked NNBD SDK sources and trying to build the dartdevc_kernel_sdk
target.
The end result is a dart_sdk.js file that is known to be incorrect
(missing uses of the legacy and nullable type wrapping) but serves
as a baseline for improvement. Some tests of the runtime directly
will correctly pass.
Following changes will turn on the type wrapping and we can start
diagnosing and fixing the issues that appear.
Fixes: #38665
Change-Id: Iddcf31ef2520fa54bf7d9ae6262c2264636b9b10
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/127780
Reviewed-by: Mark Zhou <markzipan@google.com>
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Commit-Queue: Nicholas Shahan <nshahan@google.com>
598fba0147