This seems flaky

Erik, could it be caused by https://chromium-review.googlesource.com/c/chromium/src/+/1115872 ?

If not, please re-assign to someone who can take a look.

Also here:
https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Linux%20Tests%20%28dbg%29%281%29

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/de616d7af0a63f1453b25cdcfb7ced0f1d1c9c26

commit de616d7af0a63f1453b25cdcfb7ced0f1d1c9c26
Author: Yi Gu <yigu@chromium.org>
Date: Fri Jun 29 16:02:37 2018

Mark http/tests/devtools/console-resource-errors.js flaky in TestExpectation

TBR=carlosk@chromium.org
NOTRY=true

Bug:  859064 
Change-Id: I2cbd37576a39e0a3cbb9947adb42669840613526
Reviewed-on: https://chromium-review.googlesource.com/1120437
Reviewed-by: Yi Gu <yigu@chromium.org>
Commit-Queue: Yi Gu <yigu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#571497}
[modify] https://crrev.com/de616d7af0a63f1453b25cdcfb7ced0f1d1c9c26/third_party/WebKit/LayoutTests/TestExpectations

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/7d78d65f49a8949482b399222bbd8934fd4259b1

commit 7d78d65f49a8949482b399222bbd8934fd4259b1
Author: Yi Gu <yigu@chromium.org>
Date: Sat Jun 30 03:30:38 2018

Update http/tests/devtools/console-resource-errors.js in test expectation

TBR=luoe@chromium.org
NOTRY=True

Bug:  859064 
Change-Id: Ib465b82c39f3d594f95b73df29fe5684020e5bd6
Reviewed-on: https://chromium-review.googlesource.com/1121628
Reviewed-by: Yi Gu <yigu@chromium.org>
Commit-Queue: Yi Gu <yigu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#571753}
[modify] https://crrev.com/7d78d65f49a8949482b399222bbd8934fd4259b1/third_party/WebKit/LayoutTests/TestExpectations

 Issue 860145  has been merged into this issue.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/284de34d39b7bc4263c227f0df442d91b6b05618

commit 284de34d39b7bc4263c227f0df442d91b6b05618
Author: Makoto Shimazu <shimazu@chromium.org>
Date: Wed Jul 04 07:56:42 2018

Mark http/tests/devtools/console-resource-errors.js as flaky

TBR=luoe@chromium.org
NOTRY=true

Bug:  859064 
Change-Id: I2c8478e61a3680d2a170afa70bd5e689e7e2e97e
Reviewed-on: https://chromium-review.googlesource.com/1125657
Reviewed-by: Makoto Shimazu <shimazu@chromium.org>
Commit-Queue: Makoto Shimazu <shimazu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#572510}
[modify] https://crrev.com/284de34d39b7bc4263c227f0df442d91b6b05618/third_party/WebKit/LayoutTests/TestExpectations

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/048d7c8f95850271e46a466ea2f7fc8d4a44a050

commit 048d7c8f95850271e46a466ea2f7fc8d4a44a050
Author: Erik Luo <luoe@chromium.org>
Date: Tue Dec 18 03:41:43 2018

DevTools: fix misc flaky console tests

Bug:  859064 ,  907736 
Change-Id: I262d466b701414f36e7bc09ebc113c9e8f31b69f
Reviewed-on: https://chromium-review.googlesource.com/c/1380997
Commit-Queue: Erik Luo <luoe@chromium.org>
Reviewed-by: Joel Einbinder <einbinder@chromium.org>
Cr-Commit-Position: refs/heads/master@{#617369}
[modify] https://crrev.com/048d7c8f95850271e46a466ea2f7fc8d4a44a050/third_party/blink/web_tests/TestExpectations
[modify] https://crrev.com/048d7c8f95850271e46a466ea2f7fc8d4a44a050/third_party/blink/web_tests/http/tests/devtools/console-resource-errors-expected.txt
[modify] https://crrev.com/048d7c8f95850271e46a466ea2f7fc8d4a44a050/third_party/blink/web_tests/http/tests/devtools/console-resource-errors.js