Revert of Make extensions DSE persistent in browser prefs

Revert of Make extensions DSE persistent in browser prefs (patchset #15 id:280001 of https://codereview.chromium.org/2479113002/ )

Reason for revert:
ExtensionBrowserTest.OverrideHomePageSettings and ExtensionBrowserTest.OverrideStartupPagesSettings are flaky.

BUG=679470, 679569
Original issue's description:
> Make extensions DSE persistent in browser prefs
> 
> This fix stores extension installed DSE in browser prefs using extension
> overriden preferences API. This is needed so extension installed default
> search would be available from browser before extensions subsystem load.
> This will affect url for first loaded NTP which is taken from current
> default search settings.
> 
> BUG=450534
> 
> R=pkasting@chromium.org, vasilii@chromium.org
> 
> Review-Url: https://codereview.chromium.org/2479113002
> Cr-Commit-Position: refs/heads/master@{#442235}
> Committed: https://chromium.googlesource.com/chromium/src/+/f5f1407adee2b18b59b33fb8d74739dcc27d8c0b

TBR=gab@chromium.org,hashimoto@chromium.org,maxbogue@chromium.org,pkasting@chromium.org,vasilii@chromium.org,a-v-y@yandex-team.ru
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=450534
Review-Url: https://codereview.chromium.org/2623833005
Cr-Commit-Position: refs/heads/master@{#442612}
Committed: https://chromium.googlesource.com/chromium/src/+/8534d16a27bc5999a28c0d964e1a5b5409617b39

[foolip, 2017-01-10 15:40:55]

The CQ bit was checked by foolip@chromium.org

[foolip, 2017-01-10 15:40:56]

Created Revert of Make extensions DSE persistent in browser prefs

[commit-bot: I haz the power, 2017-01-10 15:41:17]

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, 2017-01-10 16:51:07]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1484062855705340, "parent_rev":
"2cad8b6680852a10a9e6e342c8b78dd701e8c656", "commit_rev":
"8534d16a27bc5999a28c0d964e1a5b5409617b39"}

[commit-bot: I haz the power, 2017-01-10 16:51:36]

Description was changed from

==========
Revert of Make extensions DSE persistent in browser prefs (patchset #15
id:280001 of https://codereview.chromium.org/2479113002/ )

Reason for revert:
ExtensionBrowserTest.OverrideHomePageSettings and
ExtensionBrowserTest.OverrideStartupPagesSettings are flaky.

BUG=679470,679569 

Original issue's description:
> Make extensions DSE persistent in browser prefs
> 
> This fix stores extension installed DSE in browser prefs using extension
> overriden preferences API. This is needed so extension installed default
> search would be available from browser before extensions subsystem load.
> This will affect url for first loaded NTP which is taken from current
> default search settings.
> 
> BUG=450534
> 
> R=pkasting@chromium.org, vasilii@chromium.org
> 
> Review-Url: https://codereview.chromium.org/2479113002
> Cr-Commit-Position: refs/heads/master@{#442235}
> Committed:
https://chromium.googlesource.com/chromium/src/+/f5f1407adee2b18b59b33fb8d747...

TBR=gab@chromium.org,hashimoto@chromium.org,maxbogue@chromium.org,pkasting@ch...
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=450534
==========

to

==========
Revert of Make extensions DSE persistent in browser prefs (patchset #15
id:280001 of https://codereview.chromium.org/2479113002/ )

Reason for revert:
ExtensionBrowserTest.OverrideHomePageSettings and
ExtensionBrowserTest.OverrideStartupPagesSettings are flaky.

BUG=679470,679569 

Original issue's description:
> Make extensions DSE persistent in browser prefs
> 
> This fix stores extension installed DSE in browser prefs using extension
> overriden preferences API. This is needed so extension installed default
> search would be available from browser before extensions subsystem load.
> This will affect url for first loaded NTP which is taken from current
> default search settings.
> 
> BUG=450534
> 
> R=pkasting@chromium.org, vasilii@chromium.org
> 
> Review-Url: https://codereview.chromium.org/2479113002
> Cr-Commit-Position: refs/heads/master@{#442235}
> Committed:
https://chromium.googlesource.com/chromium/src/+/f5f1407adee2b18b59b33fb8d747...

TBR=gab@chromium.org,hashimoto@chromium.org,maxbogue@chromium.org,pkasting@ch...
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=450534

Review-Url: https://codereview.chromium.org/2623833005
Cr-Commit-Position: refs/heads/master@{#442612}
Committed:
https://chromium.googlesource.com/chromium/src/+/8534d16a27bc5999a28c0d964e1a...
==========

[commit-bot: I haz the power, 2017-01-10 16:51:37]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/8534d16a27bc5999a28c0d964e1a...

[stevenjb, 2017-01-20 23:28:10]

On 2017/01/10 16:51:37, commit-bot: I haz the power wrote:
> Committed patchset #1 (id:1) as
>
https://chromium.googlesource.com/chromium/src/+/8534d16a27bc5999a28c0d964e1a...

Note: The reverted CL was also the cause of crbug.com/680197

[stevenjb, 2017-01-20 23:28:32]

On 2017/01/20 23:28:10, stevenjb wrote:
> On 2017/01/10 16:51:37, commit-bot: I haz the power wrote:
> > Committed patchset #1 (id:1) as
> >
>
https://chromium.googlesource.com/chromium/src/+/8534d16a27bc5999a28c0d964e1a...
> 
> Note: The reverted CL was also the cause of crbug.com/680197

(Oops, wrong CL, please ignore)