Make top-layer elements work also when the viewport is paginated.

Make top-layer elements work also when the viewport is paginated.

When the viewport is paginated (by overflow:-webkit-paged-* specified on HTML
or BODY), top-layer elements are redirected to a flow thread, along with
everything else. So we have to go through the children of the flow thread, not
the children of the layout view, when looking for them.

BUG=594306
Committed: https://crrev.com/5233aa994b11d17c287311089234f58dbbead280
Cr-Commit-Position: refs/heads/master@{#385883}

[mstensho (USE GERRIT), 2016-04-01 12:17:23]

mstensho@opera.com changed reviewers:
+ chrishtr@chromium.org

[mstensho (USE GERRIT), 2016-04-07 07:39:56]

Description was changed from

==========
Make top-layer elements work also when the viewport is paginated.

When the viewport is paginated (by overflow:-webkit-paged-* specified on HTML
or BODY), top-layer elements are redirected to a flow thread, along with
everything else. So we have to go through the children of the flow thread, not
the children of the layout view, when looking for them.

BUG=594306
==========

to

==========
Make top-layer elements work also when the viewport is paginated.

When the viewport is paginated (by overflow:-webkit-paged-* specified on HTML
or BODY), top-layer elements are redirected to a flow thread, along with
everything else. So we have to go through the children of the flow thread, not
the children of the layout view, when looking for them.

BUG=594306
==========

[mstensho (USE GERRIT), 2016-04-07 07:39:56]

mstensho@opera.com changed reviewers:
+ wangxianzhu@chromium.org

[Xianzhu, 2016-04-07 16:43:36]

https://codereview.chromium.org/1850153002/diff/1/third_party/WebKit/LayoutTe...
File third_party/WebKit/LayoutTests/fast/pagination/modal-dialog-crash.html
(right):

https://codereview.chromium.org/1850153002/diff/1/third_party/WebKit/LayoutTe...
third_party/WebKit/LayoutTests/fast/pagination/modal-dialog-crash.html:23:
setTimeout(paginateAllTheThings, 500);
Can you use runAfterLayoutAndPaint()
(../../resources/run-after-layout-and-paint.js) instead of setTimeout?

[mstensho (USE GERRIT), 2016-04-07 18:43:18]

https://codereview.chromium.org/1850153002/diff/1/third_party/WebKit/LayoutTe...
File third_party/WebKit/LayoutTests/fast/pagination/modal-dialog-crash.html
(right):

https://codereview.chromium.org/1850153002/diff/1/third_party/WebKit/LayoutTe...
third_party/WebKit/LayoutTests/fast/pagination/modal-dialog-crash.html:23:
setTimeout(paginateAllTheThings, 500);
On 2016/04/07 16:43:36, Xianzhu wrote:
> Can you use runAfterLayoutAndPaint()
> (../../resources/run-after-layout-and-paint.js) instead of setTimeout?

Done.

[Xianzhu, 2016-04-07 19:00:02]

The CQ bit was checked by wangxianzhu@chromium.org

[Xianzhu, 2016-04-07 19:00:02]

lgtm

[commit-bot: I haz the power, 2016-04-07 19:00:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1850153002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1850153002/20001

[commit-bot: I haz the power, 2016-04-07 20:17:11]

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

[commit-bot: I haz the power, 2016-04-07 20:17:12]

Try jobs failed on following builders:
  linux_chromium_chromeos_rel_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[mstensho (USE GERRIT), 2016-04-07 20:19:58]

The CQ bit was checked by mstensho@opera.com

[commit-bot: I haz the power, 2016-04-07 20:20:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1850153002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1850153002/20001

[commit-bot: I haz the power, 2016-04-07 21:40:39]

Description was changed from

==========
Make top-layer elements work also when the viewport is paginated.

When the viewport is paginated (by overflow:-webkit-paged-* specified on HTML
or BODY), top-layer elements are redirected to a flow thread, along with
everything else. So we have to go through the children of the flow thread, not
the children of the layout view, when looking for them.

BUG=594306
==========

to

==========
Make top-layer elements work also when the viewport is paginated.

When the viewport is paginated (by overflow:-webkit-paged-* specified on HTML
or BODY), top-layer elements are redirected to a flow thread, along with
everything else. So we have to go through the children of the flow thread, not
the children of the layout view, when looking for them.

BUG=594306
==========

[commit-bot: I haz the power, 2016-04-07 21:40:41]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-04-07 21:43:03]

Description was changed from

==========
Make top-layer elements work also when the viewport is paginated.

When the viewport is paginated (by overflow:-webkit-paged-* specified on HTML
or BODY), top-layer elements are redirected to a flow thread, along with
everything else. So we have to go through the children of the flow thread, not
the children of the layout view, when looking for them.

BUG=594306
==========

to

==========
Make top-layer elements work also when the viewport is paginated.

When the viewport is paginated (by overflow:-webkit-paged-* specified on HTML
or BODY), top-layer elements are redirected to a flow thread, along with
everything else. So we have to go through the children of the flow thread, not
the children of the layout view, when looking for them.

BUG=594306

Committed: https://crrev.com/5233aa994b11d17c287311089234f58dbbead280
Cr-Commit-Position: refs/heads/master@{#385883}
==========

[commit-bot: I haz the power, 2016-04-07 21:43:04]

Patchset 2 (id:??) landed as
https://crrev.com/5233aa994b11d17c287311089234f58dbbead280
Cr-Commit-Position: refs/heads/master@{#385883}