[layoutng] Better abspos support in legacy interop

[layoutng] Better abspos support in legacy interop

In legacy layout, abspos differs from regular blocks in that abspos blocks
position themselves in their own layout, instead of getting positioned by
their parent. So it we are a positioned block in a legacy-layout containing
block, we have to emulate this positioning, which is what this change does.

Fixes this testcase:
<div style="height: 200px; background: yellow; position: relative;">
  XXX
  <div style="position: absolute; bottom: 0;">
    <div>Bottom</div>
  </div>
</div>

R=atotic@chromium.org,ikilpatrick@chromium.org
BUG=635619
Committed: https://crrev.com/b235a3a7becc58e7f82760c5ee5da04f767ecbd8
Cr-Commit-Position: refs/heads/master@{#440975}

[cbiesinger, 2016-12-21 18:48:01]

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

[commit-bot: I haz the power, 2016-12-21 18:48:32]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[cbiesinger, 2016-12-21 19:42:18]

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

[commit-bot: I haz the power, 2016-12-21 19:42:53]

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, 2016-12-21 21:45:38]

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

[commit-bot: I haz the power, 2016-12-21 21:45:39]

Dry run: This issue passed the CQ dry run.

[atotic, 2016-12-29 17:49:06]

The CQ bit was checked by atotic@chromium.org

[atotic, 2016-12-29 17:49:06]

lgtm

[commit-bot: I haz the power, 2016-12-29 17:49:15]

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, 2016-12-29 19:03:42]

CQ is committing da patch.

Bot data: {"patchset_id": 40001, "attempt_start_ts": 1483033746516070,
"parent_rev": "c6e09fe51437306cd8c87980ed74c15fa59ef53a", "commit_rev":
"b397e92327e7c161018f495cef2a83d3d2476f1f"}

[commit-bot: I haz the power, 2016-12-29 19:04:09]

Description was changed from

==========
[layoutng] Better abspos support in legacy interop

In legacy layout, abspos differs from regular blocks in that abspos blocks
position themselves in their own layout, instead of getting positioned by
their parent. So it we are a positioned block in a legacy-layout containing
block, we have to emulate this positioning, which is what this change does.

Fixes this testcase:
<div style="height: 200px; background: yellow; position: relative;">
  XXX
  <div style="position: absolute; bottom: 0;">
    <div>Bottom</div>
  </div>
</div>

R=atotic@chromium.org,ikilpatrick@chromium.org
BUG=635619
==========

to

==========
[layoutng] Better abspos support in legacy interop

In legacy layout, abspos differs from regular blocks in that abspos blocks
position themselves in their own layout, instead of getting positioned by
their parent. So it we are a positioned block in a legacy-layout containing
block, we have to emulate this positioning, which is what this change does.

Fixes this testcase:
<div style="height: 200px; background: yellow; position: relative;">
  XXX
  <div style="position: absolute; bottom: 0;">
    <div>Bottom</div>
  </div>
</div>

R=atotic@chromium.org,ikilpatrick@chromium.org
BUG=635619

Review-Url: https://codereview.chromium.org/2591273002
==========

[commit-bot: I haz the power, 2016-12-29 19:04:10]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2017-01-02 15:52:51]

Description was changed from

==========
[layoutng] Better abspos support in legacy interop

In legacy layout, abspos differs from regular blocks in that abspos blocks
position themselves in their own layout, instead of getting positioned by
their parent. So it we are a positioned block in a legacy-layout containing
block, we have to emulate this positioning, which is what this change does.

Fixes this testcase:
<div style="height: 200px; background: yellow; position: relative;">
  XXX
  <div style="position: absolute; bottom: 0;">
    <div>Bottom</div>
  </div>
</div>

R=atotic@chromium.org,ikilpatrick@chromium.org
BUG=635619

Review-Url: https://codereview.chromium.org/2591273002
==========

to

==========
[layoutng] Better abspos support in legacy interop

In legacy layout, abspos differs from regular blocks in that abspos blocks
position themselves in their own layout, instead of getting positioned by
their parent. So it we are a positioned block in a legacy-layout containing
block, we have to emulate this positioning, which is what this change does.

Fixes this testcase:
<div style="height: 200px; background: yellow; position: relative;">
  XXX
  <div style="position: absolute; bottom: 0;">
    <div>Bottom</div>
  </div>
</div>

R=atotic@chromium.org,ikilpatrick@chromium.org
BUG=635619

Committed: https://crrev.com/b235a3a7becc58e7f82760c5ee5da04f767ecbd8
Cr-Commit-Position: refs/heads/master@{#440975}
==========

[commit-bot: I haz the power, 2017-01-02 15:52:52]

Patchset 3 (id:??) landed as
https://crrev.com/b235a3a7becc58e7f82760c5ee5da04f767ecbd8
Cr-Commit-Position: refs/heads/master@{#440975}