When accessing a constant under a load guard we can push the constant to
the deferred module (as we only access it under the guard that the
module has been loaded). The access has to therefore also use the
constant initializer function from the deferred module.
We also remove `--extra-compiler-option` prefix for
`--enable-deferred-loading` as the prefix isn't recognized by
dartdev.
Change-Id: I58489303dc10bb265ef730c05a4fc78a8f598edb
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/464980
Reviewed-by: Ömer Ağacan <omersa@google.com>
Commit-Queue: Martin Kustermann <kustermann@google.com>
Martin Kustermann
c942b23b07