Breakdown:

external/wpt/svg/text/reftests/text-multiline-001.svg
external/wpt/svg/text/reftests/text-multiline-002.svg
external/wpt/svg/text/reftests/text-multiline-003.svg
external/wpt/svg/text/reftests/text-inline-size-001.svg
external/wpt/svg/text/reftests/text-inline-size-002.svg
external/wpt/svg/text/reftests/text-inline-size-003.svg
external/wpt/svg/text/reftests/text-inline-size-005.svg
external/wpt/svg/text/reftests/text-inline-size-006.svg
external/wpt/svg/text/reftests/text-inline-size-007.svg
external/wpt/svg/text/reftests/text-inline-size-101.svg
external/wpt/svg/text/reftests/text-inline-size-201.svg

These because of lack of support - relevant tasks/bugs: issue 366558 (multiline) and issue 366553 (inline-size.) Will update bugref.

external/wpt/svg/types/scripted/event-handler-all-document-element-events.svg

This looks like  issue 835570 . Will update bugref.

external/wpt/svg/painting/reftests/markers-orient-001.svg

This looks like subpixel difference - in part at least because the test (non-ref) has a red "reference" under the main test subjects - leading to bleeding on the edges of the markers (at least when using rasterizers that are not of the MSAA type.) Maybe there are additional issues (could be due to computing the marker transform differently for instance), but it's hard to tell without first "fixing" the test. I'll make a minimal tweak to hide the red reference, and we can take it from there.

I'll note that the "[ Linux Win ]" annotations are a bit odd (indicating passes on Mac), so I'd suspect that something might be up with the tests there.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/92c38676ca0f743bc95b2a18b8fbc8dd9aa506cd

commit 92c38676ca0f743bc95b2a18b8fbc8dd9aa506cd
Author: Fredrik Söderquist <fs@opera.com>
Date: Mon Aug 13 14:25:43 2018

Update bugrefs for SVG WPT tests from  crbug.com/872697 

external/wpt/svg/text/reftests/text-multiline-001.svg
external/wpt/svg/text/reftests/text-multiline-002.svg
external/wpt/svg/text/reftests/text-multiline-003.svg

 => crbug.com/366558

external/wpt/svg/text/reftests/text-inline-size-001.svg
external/wpt/svg/text/reftests/text-inline-size-002.svg
external/wpt/svg/text/reftests/text-inline-size-003.svg
external/wpt/svg/text/reftests/text-inline-size-005.svg
external/wpt/svg/text/reftests/text-inline-size-006.svg
external/wpt/svg/text/reftests/text-inline-size-007.svg
external/wpt/svg/text/reftests/text-inline-size-101.svg
external/wpt/svg/text/reftests/text-inline-size-201.svg

 => crbug.com/366553

external/wpt/svg/painting/reftests/markers-orient-001.svg

 =>  crbug.com/872697  (pending testfix)

TBR=schenney@chromium.org
BUG=366553,366558, 872697 

Change-Id: Ib75f5c0cda767108745618ab508a6a8730e3b1b1
Reviewed-on: https://chromium-review.googlesource.com/1172430
Reviewed-by: Fredrik Söderquist <fs@opera.com>
Commit-Queue: Fredrik Söderquist <fs@opera.com>
Cr-Commit-Position: refs/heads/master@{#582576}
[modify] https://crrev.com/92c38676ca0f743bc95b2a18b8fbc8dd9aa506cd/third_party/WebKit/LayoutTests/TestExpectations

> I'll note that the "[ Linux Win ]" annotations are a bit odd (indicating passes on Mac), so I'd suspect that something might be up with the tests there.

That's probably a manifestation of one of the issues blocking issue 433217. (Both of these tests are using Arabic and x/y positioned <tspan>s in the reference image; The Linux [and likely Win] bots have a 1-2 pixel position difference, thus failing the test.)

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/6c4e24f6030d950b347ccb2fb8ae4392b3f81d7a

commit 6c4e24f6030d950b347ccb2fb8ae4392b3f81d7a
Author: Fredrik Söderquist <fs@opera.com>
Date: Mon Aug 13 15:58:31 2018

Disable 'visual aid' in wpt/svg/painting/reftests/markers-orient-001.svg

The test has a red version of the reference painted under the actual
test content. Because of how alpha/coverage often work (at least in
software rasterizers), this can lead to the read bleeding through and
thus affecting the comparison with the reference image.
Disable the red reference shapes by adding a CSS rule. This way, if
someone feels it's useful for debugging they can easily re-enable it.

BUG= 872697 

Change-Id: Id47757c9dd112ead0db9c2dcd1adc74d5a52e55d
Reviewed-on: https://chromium-review.googlesource.com/1172622
Reviewed-by: Stephen Chenney <schenney@chromium.org>
Commit-Queue: Fredrik Söderquist <fs@opera.com>
Cr-Commit-Position: refs/heads/master@{#582598}
[modify] https://crrev.com/6c4e24f6030d950b347ccb2fb8ae4392b3f81d7a/third_party/WebKit/LayoutTests/external/wpt/svg/painting/reftests/markers-orient-001.svg

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/1603813c21b4b90fe634a21c046356af867a7e7d

commit 1603813c21b4b90fe634a21c046356af867a7e7d
Author: Fredrik Söderquist <fs@opera.com>
Date: Wed Aug 15 13:07:39 2018

wpt/svg/painting/reftests/markers-orient-001.svg now pass

TBR=schenney@chromium.org
BUG= 872697 

Change-Id: Ib925da7763c4091feacfd489bce1c82c752309ef
Reviewed-on: https://chromium-review.googlesource.com/1175796
Reviewed-by: Fredrik Söderquist <fs@opera.com>
Commit-Queue: Fredrik Söderquist <fs@opera.com>
Cr-Commit-Position: refs/heads/master@{#583226}
[modify] https://crrev.com/1603813c21b4b90fe634a21c046356af867a7e7d/third_party/WebKit/LayoutTests/TestExpectations

Addressed