am 9fc2e9c9: MemoryFile constructor and native methods throw IOExceptions.

Merge commit '9fc2e9c965c68d56a0caf812f7f6d38d15317063'

* commit '9fc2e9c965c68d56a0caf812f7f6d38d15317063':
  MemoryFile constructor and native methods throw IOExceptions.