Review request for JDK-8139756: Eliminate GuardedTypeConversion, DynamicLinker.getCurrentLinkRequest and its associated permission

[Attila Szegedi]

Please review JDK-8139756 "Eliminate GuardedTypeConversion, DynamicLinker.getCurrentLinkRequest and its associated permission" at <http://cr.openjdk.java.net/~attila/8139756/webrev.jdk9> for <https://bugs.openjdk.java.net/browse/JDK-8139756>

Note: webrev also shows some previous issues in the history of some of the files, but the changes for those issue are not in the diffs.

Thanks,
  Attila.