[Success!] [MERGE] Handle files that are not present in the tree when exporting (#174539)

[Bundle Buggy]

This change has been merged.
Previous status: Conditionally approved

For details, see: 
http://bundlebuggy.aaronbentley.com/project/bzr/request/%3C1235160871.27095.3.camel%40flash%3E
Project: Bazaar