[Sync] Added integ tests to verify UserEvents retry on TRANSIENT_ERROR.

[Sync] Added integ tests to verify UserEvents retry on TRANSIENT_ERROR.

BUG=728753
Review-Url: https://codereview.chromium.org/2973833002
Cr-Commit-Position: refs/heads/master@{#484939}
Committed: https://chromium.googlesource.com/chromium/src/+/0ff047cc8c4e9b8bcadf0ab951781f253afc3a12

[skym, 2017-07-06 17:22:17]

The CQ bit was checked by skym@chromium.org to run a CQ dry run

[skym, 2017-07-06 17:22:22]

skym@chromium.org changed reviewers:
+ pnoland@chromium.org

[skym, 2017-07-06 17:22:23]

PTAL

[commit-bot: I haz the power, 2017-07-06 17:22:37]

Dry run: 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, 2017-07-06 18:12:25]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-07-06 18:12:26]

Dry run: This issue passed the CQ dry run.

[Patrick Noland, 2017-07-07 00:26:05]

lgtm

[skym, 2017-07-07 15:39:06]

The CQ bit was checked by skym@chromium.org

[commit-bot: I haz the power, 2017-07-07 15:39:15]

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, 2017-07-07 15:46:49]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1499441946598370, "parent_rev":
"e249265b0a218077df83ce37c25e736575041387", "commit_rev":
"0ff047cc8c4e9b8bcadf0ab951781f253afc3a12"}

[commit-bot: I haz the power, 2017-07-07 15:47:03]

Description was changed from

==========
[Sync] Added integ tests to verify UserEvents retry on TRANSIENT_ERROR.

BUG=728753
==========

to

==========
[Sync] Added integ tests to verify UserEvents retry on TRANSIENT_ERROR.

BUG=728753

Review-Url: https://codereview.chromium.org/2973833002
Cr-Commit-Position: refs/heads/master@{#484939}
Committed:
https://chromium.googlesource.com/chromium/src/+/0ff047cc8c4e9b8bcadf0ab95178...
==========

[commit-bot: I haz the power, 2017-07-07 15:47:04]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/0ff047cc8c4e9b8bcadf0ab95178...