i will fix it.

Thanks! If you could also add tests under external/wpt/css/geometry-1/ for this difference, that would be A+. :-)

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/f81049d5a4f02b598815c00baa0d135b79304588

commit f81049d5a4f02b598815c00baa0d135b79304588
Author: hs1217.lee <hs1217.lee@samsung.com>
Date: Fri Jun 09 03:38:04 2017

[geometry] replace m12 with m21 when transform DOMPoint from DOMMatrix.

there is wrong calculate when transform DOMPoint from DOMMatrix.
we should replace m12 with m21.
unfortunately all of m12 and m21 values were zero in layout tests.
so it could not detect problems.

BUG= 730441 

Review-Url: https://codereview.chromium.org/2930883002
Cr-Commit-Position: refs/heads/master@{#478185}

[modify] https://crrev.com/f81049d5a4f02b598815c00baa0d135b79304588/third_party/WebKit/LayoutTests/fast/dom/geometry-interfaces-dom-matrix-transformPoint.html
[modify] https://crrev.com/f81049d5a4f02b598815c00baa0d135b79304588/third_party/WebKit/LayoutTests/fast/dom/geometry-interfaces-dom-point-readonly.html
[modify] https://crrev.com/f81049d5a4f02b598815c00baa0d135b79304588/third_party/WebKit/Source/core/geometry/DOMMatrixReadOnly.cpp
[modify] https://crrev.com/f81049d5a4f02b598815c00baa0d135b79304588/third_party/WebKit/Source/core/geometry/DOMPointReadOnly.cpp

@simonp
i will upload other tests for external/wpt/css/geometry-1/ indirectly.
as far as i know, external/wpt/css/geometry-1/ is synchronized 
from https://github.com/w3c/web-platform-tests periodically.

tests are merged for external/wpt/css/geometry-1/ at https://github.com/w3c/web-platform-tests.
(https://github.com/w3c/web-platform-tests/commit/29ff90825e8af4b5ced39300ce16f7c5a4b16ef6)

external/wpt/css/geometry-1/ tests were synchronized.

https://chromium.googlesource.com/chromium/src/+/e2d1d93c5b61ce06be4b0620b7e40429365e3582%5E%21/#F57
https://chromium.googlesource.com/chromium/src/+/e2d1d93c5b61ce06be4b0620b7e40429365e3582%5E%21/#F58

\o/

This can be closed as fixed, then, right?

(Since there is two-way syncing for wpt, it should be possible to add tests in a Chromium CL and it will be automatically upstreamed to web-platform-tests, but either way works of course.)

\o/

This can be closed as fixed, then, right?

(Since there is two-way syncing for wpt, it should be possible to add tests in a Chromium CL and it will be automatically upstreamed to web-platform-tests, but either way works of course.)

yes. i will close this issue as fixed. thank you.