This doesn't use our own source map mapper (which is harder to
integrate here). This appear to use V8 specific hooks, but seems to
work more seamlessly.
Change-Id: I622314f9190ca161e37d77a8ba1b659891469834
Reviewed-on: https://dart-review.googlesource.com/14500
Reviewed-by: Jacob Richman <jacobr@google.com>
Commit-Queue: Vijay Menon <vsm@google.com>
Vijay Menon