Unable to test because of `java.lang.RuntimeException: Unable to find static field: LEGACY`

[p-himik]

Most likely, due to this: https://github.com/google/closure-compiler/wiki/Releases#feb-04-2018-v20180204

[p-himik]

Changed default resolution mode to BROWSER and removed LEGACY:
google/closure-compiler@4b3ba36#diff-1f1bd5d9eea2bdbec7f9d6539ed0c9db
google/closure-compiler@c2cd433#diff-76e2cb42c3e60de86f6f13b4087e3abf

[swannodette]

Looking into this one