Revert of Only create sticky position constraints for constrained sticky position.

Revert of Only create sticky position constraints for constrained sticky position. (patchset #4 id:60001 of https://codereview.chromium.org/2769353002/ )

Reason for revert:
It causes telemetry_perf_unittests failing on chromium.android/Android N5X Swarm Builder.

crbug.com/710142.

Original issue's description:
> Only create sticky position constraints for constrained sticky position.
> 
> If sticky position is unconstrained we don't need to create constraints for it,
> or add it to viewport constrained objects (causing scroll on main), or repaint
> on scroll.
> 
> BUG=704817
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
> 
> Review-Url: https://codereview.chromium.org/2769353002
> Cr-Commit-Position: refs/heads/master@{#463316}
> Committed: https://chromium.googlesource.com/chromium/src/+/06e9b5a6a5649e4d842f40ad667554c58dc26c29

TBR=chrishtr@chromium.org,flackr@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=704817
Review-Url: https://codereview.chromium.org/2811803003
Cr-Commit-Position: refs/heads/master@{#463402}
Committed: https://chromium.googlesource.com/chromium/src/+/e0f87e573b0b8cba4b2d739a8c5a86c0f448d513

[Xi Han, 2017-04-10 21:30:11]

The CQ bit was checked by hanxi@chromium.org

[Xi Han, 2017-04-10 21:30:11]

Created Revert of Only create sticky position constraints for constrained sticky
position.

[commit-bot: I haz the power, 2017-04-10 21:31:23]

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, 2017-04-10 21:34:00]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1491859811301230, "parent_rev":
"99bc0460eec9022684af3ee7386774953186e6a5", "commit_rev":
"e0f87e573b0b8cba4b2d739a8c5a86c0f448d513"}

[commit-bot: I haz the power, 2017-04-10 21:35:06]

Description was changed from

==========
Revert of Only create sticky position constraints for constrained sticky
position. (patchset #4 id:60001 of https://codereview.chromium.org/2769353002/ )

Reason for revert:
It causes telemetry_perf_unittests failing on chromium.android/Android N5X Swarm
Builder.

crbug.com/710142.

Original issue's description:
> Only create sticky position constraints for constrained sticky position.
> 
> If sticky position is unconstrained we don't need to create constraints for
it,
> or add it to viewport constrained objects (causing scroll on main), or repaint
> on scroll.
> 
> BUG=704817
>
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
> 
> Review-Url: https://codereview.chromium.org/2769353002
> Cr-Commit-Position: refs/heads/master@{#463316}
> Committed:
https://chromium.googlesource.com/chromium/src/+/06e9b5a6a5649e4d842f40ad6675...

TBR=chrishtr@chromium.org,flackr@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=704817
==========

to

==========
Revert of Only create sticky position constraints for constrained sticky
position. (patchset #4 id:60001 of https://codereview.chromium.org/2769353002/ )

Reason for revert:
It causes telemetry_perf_unittests failing on chromium.android/Android N5X Swarm
Builder.

crbug.com/710142.

Original issue's description:
> Only create sticky position constraints for constrained sticky position.
> 
> If sticky position is unconstrained we don't need to create constraints for
it,
> or add it to viewport constrained objects (causing scroll on main), or repaint
> on scroll.
> 
> BUG=704817
>
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
> 
> Review-Url: https://codereview.chromium.org/2769353002
> Cr-Commit-Position: refs/heads/master@{#463316}
> Committed:
https://chromium.googlesource.com/chromium/src/+/06e9b5a6a5649e4d842f40ad6675...

TBR=chrishtr@chromium.org,flackr@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=704817

Review-Url: https://codereview.chromium.org/2811803003
Cr-Commit-Position: refs/heads/master@{#463402}
Committed:
https://chromium.googlesource.com/chromium/src/+/e0f87e573b0b8cba4b2d739a8c5a...
==========

[commit-bot: I haz the power, 2017-04-10 21:35:07]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/e0f87e573b0b8cba4b2d739a8c5a...