Merge most of LayoutBox::mapLocalToAncestor() into LayoutObject.

Merge most of LayoutBox::mapLocalToAncestor() into LayoutObject.

Just kept the part that updates the IsFixed MapCoordinatesMode, since it wasn't
intertwined with the rest and is unique to LayoutBox-derived classes.

BUG=568492
R=leviw@chromium.org

Committed: https://crrev.com/22a7baaee30e91be8e9283b8e3e49412589092fa
Cr-Commit-Position: refs/heads/master@{#376126}

[leviw_travelin_and_unemployed, 2016-02-18 00:49:12]

\o\  \o/  /o/
    LGTM!

[leviw_travelin_and_unemployed, 2016-02-18 00:49:17]

The CQ bit was checked by leviw@chromium.org

[commit-bot: I haz the power, 2016-02-18 00:49:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1700743002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1700743002/1

[commit-bot: I haz the power, 2016-02-18 01:06:38]

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

[commit-bot: I haz the power, 2016-02-18 01:06:39]

Try jobs failed on following builders:
  linux_chromium_compile_dbg_32_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[mstensho (USE GERRIT), 2016-02-18 08:35:27]

The CQ bit was checked by mstensho@opera.com

[commit-bot: I haz the power, 2016-02-18 08:36:24]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1700743002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1700743002/1

[commit-bot: I haz the power, 2016-02-18 09:04:28]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-02-18 09:05:13]

Description was changed from

==========
Merge most of LayoutBox::mapLocalToAncestor() into LayoutObject.

Just kept the part that updates the IsFixed MapCoordinatesMode, since it wasn't
intertwined with the rest and is unique to LayoutBox-derived classes.

BUG=568492
R=leviw@chromium.org
==========

to

==========
Merge most of LayoutBox::mapLocalToAncestor() into LayoutObject.

Just kept the part that updates the IsFixed MapCoordinatesMode, since it wasn't
intertwined with the rest and is unique to LayoutBox-derived classes.

BUG=568492
R=leviw@chromium.org

Committed: https://crrev.com/22a7baaee30e91be8e9283b8e3e49412589092fa
Cr-Commit-Position: refs/heads/master@{#376126}
==========

[commit-bot: I haz the power, 2016-02-18 09:05:13]

Patchset 1 (id:??) landed as
https://crrev.com/22a7baaee30e91be8e9283b8e3e49412589092fa
Cr-Commit-Position: refs/heads/master@{#376126}