Consider 3 sampled builds where it failed:

https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Win7%20%28dbg%29/builds/10570
https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Win7%20%28dbg%29/builds/10597
https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Win7%20%28dbg%29/builds/10595

the log is 

02:13:38.123 716 worker/3 css3/filters/effect-reference-hw.html output stderr lines:
02:13:38.123 716   
02:13:38.123 716   DevTools listening on ws://127.0.0.1:63162/devtools/browser/eea2a4b6-3f34-4155-954c-4f24e54f6227
02:13:38.123 716   [4944:8040:0819/021208.213:10583747:ERROR:direct_composition_surface_win.cc(1095)] Failing to detect HDR, couldn't retrieve D3D11 device from ANGLE.
02:13:38.123 716   [4944:8040:0819/021208.355:10583887:INFO:media_foundation_video_encode_accelerator_win.cc(335)] Windows versions earlier than 8 are not supported.
02:13:38.130 3892 [10/11] css3/filters/effect-reference-hw.html failed unexpectedly (test timed out, text diff)

I will disable the test.

This test was marked [ Failure Pass ] in crbug.com/658305.

[ Failure Pass Timeout ] to be precise.

CS https://cs.chromium.org/chromium/src/third_party/WebKit/LayoutTests/TestExpectations?type=cs&q=crbug.com/658305.&sq=package:chromium&l=1099

It was actually disabled in https://chromium-review.googlesource.com/c/chromium/src/+/627299

(issue 757955)

shend@, could you redirect please?

effect-reference-colorspace-hw.html is also flaky.

It failed in

https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Win7%20%28dbg%29/builds/10604

https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Win7%20%28dbg%29/builds/10606

Basically the same log

01:29:54.939 4192 worker/4 css3/filters/effect-reference-colorspace-hw.html output stderr lines:
01:29:54.939 4192   [5420:5552:0823/012825.286:37437572:ERROR:direct_composition_surface_win.cc(1095)] Failing to detect HDR, couldn't retrieve D3D11 device from ANGLE.
01:29:54.939 4192   [5420:5552:0823/012825.352:37437634:INFO:media_foundation_video_encode_accelerator_win.cc(335)] Windows versions earlier than 8 are not supported.
01:29:54.958 5556 [16/18] css3/filters/effect-reference-colorspace-hw.html failed unexpectedly (test timed out, text diff)

The timeouts are being disabled in https://chromium-review.googlesource.com/c/chromium/src/+/628736.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/97d33b7704eb40400fbce5e10512dea9bde839e1

commit 97d33b7704eb40400fbce5e10512dea9bde839e1
Author: Vitalii Iarko <vitaliii@chromium.org>
Date: Wed Aug 23 13:55:33 2017

Ignore effect-reference-colorspace-hw.html timeouts because flaky.

TBR=shend@chromium.org

Bug: 658305,758133
Change-Id: I4fb6e2fd2a076eddd4d74b897c1dd5ba79b36c9b
Reviewed-on: https://chromium-review.googlesource.com/628736
Reviewed-by: vitaliii <vitaliii@chromium.org>
Commit-Queue: vitaliii <vitaliii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#496673}
[modify] https://crrev.com/97d33b7704eb40400fbce5e10512dea9bde839e1/third_party/WebKit/LayoutTests/TestExpectations

Redirecting to Compositing>Filters. Please assign back to me if this is really a CSS issue.

Please don't add the style-dev list to bugs. style-bugs is automatically added if the bug is in the Blink>CSS component.

This issue has been Available for over a year. If it's no longer important or seems unlikely to be fixed, please consider closing it out. If it is important, please re-triage the issue.

Sorry for the inconvenience if the bug really should have been left as Available.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot