tree d7bee0c9a3458a26d65c674c79c0f92abeae9727
parent b83371f6d7fc12a66d33eac614c0fae3aa0978ba
author Darin Petkov <petkov@chromium.org> 1282235768 -0700
committer Darin Petkov <petkov@chromium.org> 1282235768 -0700

AU: Update status to DOWNLOADING only after receiving some bytes from server.

This ensures that users don't see an update download notification until
after a download has successfully started.

Also, added some DownloadActionDelegate unit tests.

BUG=5822
TEST=unit tests, gmerged to device, made sure updates happened and
notifications received

Change-Id: I96912dcd98a53e9bd7eecc63dab704f959a06441

Review URL: http://codereview.chromium.org/3131022