When a macro declaration is supplied as dill, the macro api library
is not directly needed by the source libraries. Therefore, in order
to determine whether macro declarations are available, we need to also
look up the macro api library in the dill loader.
Closes#54560
Change-Id: I131d3881f557566871d9e8c9f38c19029637c534
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/346000
Reviewed-by: Morgan :) <davidmorgan@google.com>
Commit-Queue: Johnni Winther <johnniwinther@google.com>
Reviewed-by: Nicholas Shahan <nshahan@google.com>
Johnni Winther
6ce7ec657e