tree 489ee94df8b6f0d1dcd47e14d06d2a7790667ad4
parent a376d030a2075909219926d622b71016418d7dcd
author Wei-Ta Chen <weita@google.com> 1287719788 -0700
committer Wei-Ta Chen <weita@google.com> 1287729612 -0700

Fix 3122139, where previewing an attachment for the second time will
fail.

Use AutoFDSeek to mark and restore the position before we read data from
the descriptor.

Change-Id: I3d4f012dce486e19b113bc90a98b94031cfa8195