Convert Parser.rewriteAndRecover to return the token before the insertion
Convert Parser.rewriteAndRecover to return the token before the insertion

Change-Id: Ib7db1a7e48b48f2137edacd921b35d5c86313419
Reviewed-on: https://dart-review.googlesource.com/28521
Reviewed-by: Peter von der Ahé <ad40f903ca639ca334d95dc5a5f0ae92bd708079@google.com>
Reviewed-by: Dan Rubel <5c5a7a1a3f9344592135bed55605519045cfa711@google.com>
Commit-Queue: Brian Wilkerson <1f7641b6b14c52b9163524ab8d9aabff80176f21@google.com>

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