Disable flaky MigrationSingleClientTest tests.

Disable flaky MigrationSingleClientTest tests.

These are reported as flaky. Though locally they fail every time?

Disabling:
- MigrationSingleClientTest.AllTypesAtOnce
- MigrationSingleClientTest.AllTypesAtOnceTriggerNotification
- MigrationSingleClientTest.AllTypesWithNigoriAtOnce
- MigrationSingleClientTest.BookmarksPrefsBoth
- MigrationSingleClientTest.BookmarksPrefsIndividually
- MigrationSingleClientTest.NigoriOnly
- MigrationSingleClientTest.PrefsNigoriBoth
- MigrationSingleClientTest.PrefsOnlyModifyBookmark
- MigrationSingleClientTest.PrefsOnlyModifyPref
- MigrationSingleClientTest.PrefsOnlyTriggerNotification

With this, *ALL* MigrationSingleClientTests that were not already
disabled are disabled. This bug needs to be investigated and the tests
re-enabled.

BUG=648480
NOTRY=True
TBR=lgcheng,stevenjb,pavely

Committed: https://crrev.com/76ad59ea95d48f29f5b8658d467d6323789f1b51
Cr-Commit-Position: refs/heads/master@{#419757}

[hbos_chromium, 2016-09-20 14:48:48]

The CQ bit was checked by hbos@chromium.org

[commit-bot: I haz the power, 2016-09-20 14:49:09]

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, 2016-09-20 14:53:25]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-20 14:55:22]

Description was changed from

==========
Disable flaky MigrationSingleClientTest tests.

These are reported as flaky. Though locally they fail every time?

Disabling:
- MigrationSingleClientTest.AllTypesAtOnce
- MigrationSingleClientTest.AllTypesAtOnceTriggerNotification
- MigrationSingleClientTest.AllTypesWithNigoriAtOnce
- MigrationSingleClientTest.BookmarksPrefsBoth
- MigrationSingleClientTest.BookmarksPrefsIndividually
- MigrationSingleClientTest.NigoriOnly
- MigrationSingleClientTest.PrefsNigoriBoth
- MigrationSingleClientTest.PrefsOnlyModifyBookmark
- MigrationSingleClientTest.PrefsOnlyModifyPref
- MigrationSingleClientTest.PrefsOnlyTriggerNotification

With this, *ALL* MigrationSingleClientTests that were not already
disabled are disabled. This bug needs to be investigated and the tests
re-enabled.

BUG=648480
NOTRY=True
TBR=lgcheng,stevenjb,pavely
==========

to

==========
Disable flaky MigrationSingleClientTest tests.

These are reported as flaky. Though locally they fail every time?

Disabling:
- MigrationSingleClientTest.AllTypesAtOnce
- MigrationSingleClientTest.AllTypesAtOnceTriggerNotification
- MigrationSingleClientTest.AllTypesWithNigoriAtOnce
- MigrationSingleClientTest.BookmarksPrefsBoth
- MigrationSingleClientTest.BookmarksPrefsIndividually
- MigrationSingleClientTest.NigoriOnly
- MigrationSingleClientTest.PrefsNigoriBoth
- MigrationSingleClientTest.PrefsOnlyModifyBookmark
- MigrationSingleClientTest.PrefsOnlyModifyPref
- MigrationSingleClientTest.PrefsOnlyTriggerNotification

With this, *ALL* MigrationSingleClientTests that were not already
disabled are disabled. This bug needs to be investigated and the tests
re-enabled.

BUG=648480
NOTRY=True
TBR=lgcheng,stevenjb,pavely

Committed: https://crrev.com/76ad59ea95d48f29f5b8658d467d6323789f1b51
Cr-Commit-Position: refs/heads/master@{#419757}
==========

[commit-bot: I haz the power, 2016-09-20 14:55:23]

Patchset 1 (id:??) landed as
https://crrev.com/76ad59ea95d48f29f5b8658d467d6323789f1b51
Cr-Commit-Position: refs/heads/master@{#419757}

[ymalik, 2016-09-20 15:14:56]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/2351903003/ by ymalik@chromium.org.

The reason for reverting is: No need to disable these tests as the flakyness was
fixed by https://codereview.chromium.org/2338213009.