Extra fix: do not add output units for constants if deferred loading is disabled
Extra fix: do not add output units for constants if deferred loading is disabled

R=38177631bcca88ccece61f6f92cbfa56c19af864@google.com

Change-Id: I76902f4a3672d90db68d81ea8f479fcb44630221
Reviewed-on: https://dart-review.googlesource.com/42887
Reviewed-by: Emily Fortuna <38177631bcca88ccece61f6f92cbfa56c19af864@google.com>

dart-lang/sdk,dart-archive/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dart-lang/sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk