Revert of Fix flaky DownloadTest.FeedbackServiceKeepDownload

Revert of Fix flaky DownloadTest.FeedbackServiceKeepDownload (patchset #2 id:20001 of https://codereview.chromium.org/2778853002/ )

Reason for revert:
Should use DownloadTestObserverTerminal instead. 

Original issue's description:
> Fix flaky DownloadTest.FeedbackServiceKeepDownload
> 
> BUG=705224
> 
> Review-Url: https://codereview.chromium.org/2778853002
> Cr-Commit-Position: refs/heads/master@{#460894}
> Committed: https://chromium.googlesource.com/chromium/src/+/0e417c028e62d771638997c4545a359ba93027ec

TBR=dtrainor@chromium.org,qinmin@chromium.org,asanka@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=705224
Review-Url: https://codereview.chromium.org/2786103005
Cr-Commit-Position: refs/heads/master@{#461143}
Committed: https://chromium.googlesource.com/chromium/src/+/cbadcddfb7adac0f013ff2522647f78c19088c5b

[Jialiu Lin, 2017-03-31 16:24:42]

The CQ bit was checked by jialiul@chromium.org

[Jialiu Lin, 2017-03-31 16:24:42]

Created Revert of Fix flaky DownloadTest.FeedbackServiceKeepDownload

[commit-bot: I haz the power, 2017-03-31 16:25:29]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-03-31 16:26:14]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1490977482121070, "parent_rev":
"f3bd4b3364770b777839da74c479b0ae9a063cb3", "commit_rev":
"cbadcddfb7adac0f013ff2522647f78c19088c5b"}

[commit-bot: I haz the power, 2017-03-31 16:27:04]

Description was changed from

==========
Revert of Fix flaky DownloadTest.FeedbackServiceKeepDownload (patchset #2
id:20001 of https://codereview.chromium.org/2778853002/ )

Reason for revert:
Should use DownloadTestObserverTerminal instead. 

Original issue's description:
> Fix flaky DownloadTest.FeedbackServiceKeepDownload
> 
> BUG=705224
> 
> Review-Url: https://codereview.chromium.org/2778853002
> Cr-Commit-Position: refs/heads/master@{#460894}
> Committed:
https://chromium.googlesource.com/chromium/src/+/0e417c028e62d771638997c4545a...

TBR=dtrainor@chromium.org,qinmin@chromium.org,asanka@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=705224
==========

to

==========
Revert of Fix flaky DownloadTest.FeedbackServiceKeepDownload (patchset #2
id:20001 of https://codereview.chromium.org/2778853002/ )

Reason for revert:
Should use DownloadTestObserverTerminal instead. 

Original issue's description:
> Fix flaky DownloadTest.FeedbackServiceKeepDownload
> 
> BUG=705224
> 
> Review-Url: https://codereview.chromium.org/2778853002
> Cr-Commit-Position: refs/heads/master@{#460894}
> Committed:
https://chromium.googlesource.com/chromium/src/+/0e417c028e62d771638997c4545a...

TBR=dtrainor@chromium.org,qinmin@chromium.org,asanka@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=705224

Review-Url: https://codereview.chromium.org/2786103005
Cr-Commit-Position: refs/heads/master@{#461143}
Committed:
https://chromium.googlesource.com/chromium/src/+/cbadcddfb7adac0f013ff2522647...
==========

[commit-bot: I haz the power, 2017-03-31 16:27:08]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/cbadcddfb7adac0f013ff2522647...