Add IPC messages for file reading.

Bug: 679313
Change-Id: Ic63123612706b5a20612716100406b6bb0a16ba7
Reviewed-on: https://chromium-review.googlesource.com/c/1419013
Reviewed-by: Chris Palmer <palmer@chromium.org>
Reviewed-by: Joe Downing <joedow@chromium.org>
Commit-Queue: Erik Jensen <rkjnsn@chromium.org>
Cr-Commit-Position: refs/heads/master@{#625926}
1 file changed