Revert of [Sync] Enable UserEvents by default.

Revert of [Sync] Enable UserEvents by default. (patchset #4 id:60001 of https://codereview.chromium.org/2956333002/ )

Reason for revert:
Hello skym, unfortunately the answer to "Maybe iOS will work this time" was no :( It's breaking the downstream ios_chrome_ui_egtests . One such failure here: https://uberchromegw.corp.google.com/i/internal.bling.main/builders/ipad10-device-x64/builds/5603



Original issue's description:
> [Sync] Enable UserEvents by default.
> 
> Given we have approval to launching general EventLog machinery and each
> actual EventLog use case (currently only translate) has their own
> gating features, this seems reasonable to turn off by default. Leaving
> the feature in the code such that we will have a kill switch if
> anything goes wrong.
> 
> BUG=701032
> 
> Review-Url: https://codereview.chromium.org/2956333002
> Cr-Commit-Position: refs/heads/master@{#484366}
> Committed: https://chromium.googlesource.com/chromium/src/+/afe0f2c3cac407b2c28cf01f05d67a509418f5e7

TBR=pnoland@chromium.org,skym@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=701032
Review-Url: https://codereview.chromium.org/2968133002
Cr-Commit-Position: refs/heads/master@{#484504}
Committed: https://chromium.googlesource.com/chromium/src/+/87e7882837403c14362cf27e06e4d7302f7535cb

[lody, 2017-07-06 08:55:50]

The CQ bit was checked by lod@chromium.org

[lody, 2017-07-06 08:55:50]

Created Revert of [Sync] Enable UserEvents by default.

[commit-bot: I haz the power, 2017-07-06 08:56:03]

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 08:56:19]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1499331350352700, "parent_rev":
"9b8222e9e1c07a494fec62a9c0ea8420709fb7e3", "commit_rev":
"87e7882837403c14362cf27e06e4d7302f7535cb"}

[commit-bot: I haz the power, 2017-07-06 08:56:36]

Description was changed from

==========
Revert of [Sync] Enable UserEvents by default. (patchset #4 id:60001 of
https://codereview.chromium.org/2956333002/ )

Reason for revert:
Hello skym, unfortunately the answer to "Maybe iOS will work this time" was no
:( It's breaking the downstream ios_chrome_ui_egtests . One such failure here:
https://uberchromegw.corp.google.com/i/internal.bling.main/builders/ipad10-de...



Original issue's description:
> [Sync] Enable UserEvents by default.
> 
> Given we have approval to launching general EventLog machinery and each
> actual EventLog use case (currently only translate) has their own
> gating features, this seems reasonable to turn off by default. Leaving
> the feature in the code such that we will have a kill switch if
> anything goes wrong.
> 
> BUG=701032
> 
> Review-Url: https://codereview.chromium.org/2956333002
> Cr-Commit-Position: refs/heads/master@{#484366}
> Committed:
https://chromium.googlesource.com/chromium/src/+/afe0f2c3cac407b2c28cf01f05d6...

TBR=pnoland@chromium.org,skym@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=701032
==========

to

==========
Revert of [Sync] Enable UserEvents by default. (patchset #4 id:60001 of
https://codereview.chromium.org/2956333002/ )

Reason for revert:
Hello skym, unfortunately the answer to "Maybe iOS will work this time" was no
:( It's breaking the downstream ios_chrome_ui_egtests . One such failure here:
https://uberchromegw.corp.google.com/i/internal.bling.main/builders/ipad10-de...



Original issue's description:
> [Sync] Enable UserEvents by default.
> 
> Given we have approval to launching general EventLog machinery and each
> actual EventLog use case (currently only translate) has their own
> gating features, this seems reasonable to turn off by default. Leaving
> the feature in the code such that we will have a kill switch if
> anything goes wrong.
> 
> BUG=701032
> 
> Review-Url: https://codereview.chromium.org/2956333002
> Cr-Commit-Position: refs/heads/master@{#484366}
> Committed:
https://chromium.googlesource.com/chromium/src/+/afe0f2c3cac407b2c28cf01f05d6...

TBR=pnoland@chromium.org,skym@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=701032

Review-Url: https://codereview.chromium.org/2968133002
Cr-Commit-Position: refs/heads/master@{#484504}
Committed:
https://chromium.googlesource.com/chromium/src/+/87e7882837403c14362cf27e06e4...
==========

[commit-bot: I haz the power, 2017-07-06 08:56:37]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/87e7882837403c14362cf27e06e4...