Use the outermost SVG as base when computing offsetX/Y for SVG elements

Use the outermost SVG as base when computing offsetX/Y for SVG elements

This reverts the behavior back to what it was prior to
https://codereview.chromium.org/1747223002. In short, the closest
ancestor CSS layout box is used for any SVG element. This will always
be the outermost SVG root (LayoutSVGRoot.)

BUG=624996
Review-Url: https://codereview.chromium.org/2124283002
Cr-Commit-Position: refs/heads/master@{#404217}
(cherry picked from commit bb725f3a42fd8caa33c542e46fe4d9fc7a72678f)

Committed: https://chromium.googlesource.com/chromium/src/+/162fbdaa3d5778e2f02a47c1595400d328df4b22

[fs, 2016-07-18 09:36:44]

Description was changed from

==========
Use the outermost SVG as base when computing offsetX/Y for SVG elements

This reverts the behavior back to what it was prior to
https://codereview.chromium.org/1747223002. In short, the closest
ancestor CSS layout box is used for any SVG element. This will always
be the outermost SVG root (LayoutSVGRoot.)

BUG=624996

Review-Url: https://codereview.chromium.org/2124283002
Cr-Commit-Position: refs/heads/master@{#404217}
(cherry picked from commit bb725f3a42fd8caa33c542e46fe4d9fc7a72678f)
==========

to

==========
Use the outermost SVG as base when computing offsetX/Y for SVG elements

This reverts the behavior back to what it was prior to
https://codereview.chromium.org/1747223002. In short, the closest
ancestor CSS layout box is used for any SVG element. This will always
be the outermost SVG root (LayoutSVGRoot.)

BUG=624996

Review-Url: https://codereview.chromium.org/2124283002
Cr-Commit-Position: refs/heads/master@{#404217}
(cherry picked from commit bb725f3a42fd8caa33c542e46fe4d9fc7a72678f)

Committed:
https://chromium.googlesource.com/chromium/src/+/162fbdaa3d5778e2f02a47c15954...
==========

[fs, 2016-07-18 09:36:46]

Committed patchset #1 (id:1) manually as
162fbdaa3d5778e2f02a47c1595400d328df4b22.