This is an initial implementation of the dart deobfuscator tool.
Let me know your thoughts on the package name. I used to have this named as
`package:deobfuscate`, but it feels like we will want to add more tools that are
not about deobfuscation in the future, so I picked `package:dart2js_tools`
instead. That also gives us the opportunity to move over the dart2js_info code
here too.
Change-Id: I2ff948982969c9c76bc84cdc78cbe237abc87378
Reviewed-on: https://dart-review.googlesource.com/69243
Reviewed-by: Stephen Adams <sra@google.com>
Commit-Queue: Sigmund Cherem <sigmund@google.com>
Sigmund Cherem