Display -webkit-filter objects in any column (instead of only in the first one).

Display -webkit-filter objects in any column (instead of only in the first one).

Most of our painting-related operations take place after fragmentation, i.e.
via PaintLayerPainter::paintFragmentWithPhase(). All such operations can just
sit back and relax and not worry about fragmentation, since translation and
clipping for a given fragmentainer (column) has already taken place.

This is not the case for filters, though. They are set up before fragmentation.
Therefore, we need to make the bounding box of the layer visual (convert out of
the flow thread coordinate space) on our own. We now do this specifically for
filters, or we'd upset other parts of the code, such as clip path.

BUG=530074
R=wangxianzhu@chromium.org

Review URL: https://codereview.chromium.org/1645583002

Cr-Commit-Position: refs/heads/master@{#371808}
(cherry picked from commit 17e31b8972050ad7791d2243a19f07ba8fc9c54f)

Committed: https://chromium.googlesource.com/chromium/src/+/1d27087920d963b5c8aa6f9c3a8624e34f319def

[mstensho (USE GERRIT), 2016-02-02 07:43:31]

Description was changed from

==========
Display -webkit-filter objects in any column (instead of only in the first one).

Most of our painting-related operations take place after fragmentation, i.e.
via PaintLayerPainter::paintFragmentWithPhase(). All such operations can just
sit back and relax and not worry about fragmentation, since translation and
clipping for a given fragmentainer (column) has already taken place.

This is not the case for filters, though. They are set up before fragmentation.
Therefore, we need to make the bounding box of the layer visual (convert out of
the flow thread coordinate space) on our own. We now do this specifically for
filters, or we'd upset other parts of the code, such as clip path.

BUG=530074
R=wangxianzhu@chromium.org

Review URL: https://codereview.chromium.org/1645583002

Cr-Commit-Position: refs/heads/master@{#371808}
(cherry picked from commit 17e31b8972050ad7791d2243a19f07ba8fc9c54f)
==========

to

==========
Display -webkit-filter objects in any column (instead of only in the first one).

Most of our painting-related operations take place after fragmentation, i.e.
via PaintLayerPainter::paintFragmentWithPhase(). All such operations can just
sit back and relax and not worry about fragmentation, since translation and
clipping for a given fragmentainer (column) has already taken place.

This is not the case for filters, though. They are set up before fragmentation.
Therefore, we need to make the bounding box of the layer visual (convert out of
the flow thread coordinate space) on our own. We now do this specifically for
filters, or we'd upset other parts of the code, such as clip path.

BUG=530074
R=wangxianzhu@chromium.org

Review URL: https://codereview.chromium.org/1645583002

Cr-Commit-Position: refs/heads/master@{#371808}
(cherry picked from commit 17e31b8972050ad7791d2243a19f07ba8fc9c54f)

Committed:
https://chromium.googlesource.com/chromium/src/+/1d27087920d963b5c8aa6f9c3a86...
==========

[mstensho (USE GERRIT), 2016-02-02 07:43:33]

Committed patchset #1 (id:1) manually as
1d27087920d963b5c8aa6f9c3a8624e34f319def.