am b8d40d26: am 30f5c8fe: More DropBoxManager javadoc love.

Merge commit 'b8d40d263bc18d1defc1e6980e8f922df8f8f321'

* commit 'b8d40d263bc18d1defc1e6980e8f922df8f8f321':
  More DropBoxManager javadoc love.