73e13aefe6
Various changes made for strong mode. Bug: Change-Id: I7d57cba0ec0420b68f7c1cf3d31fb4c8577e9898 Reviewed-on: https://dart-review.googlesource.com/13201 Commit-Queue: Ben Konyi <bkonyi@google.com> Reviewed-by: Bob Nystrom <rnystrom@google.com> Reviewed-by: Janice Collins <jcollins@google.com>