The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/47e29208adba250e05e256ed3e21b6c84ca7ef22

commit 47e29208adba250e05e256ed3e21b6c84ca7ef22
Author: Alexei Filippov <alph@chromium.org>
Date: Wed Apr 26 19:38:06 2017

Mark external/wpt/media-source/mediasource-{remove,activesourcebuffers}.html tests as flaky

BUG=715718
TBR=pfeldman@chromium.org,pkalinnikov@chromium.org

Review-Url: https://codereview.chromium.org/2845693003 .
Cr-Commit-Position: refs/heads/master@{#467414}

[modify] https://crrev.com/47e29208adba250e05e256ed3e21b6c84ca7ef22/third_party/WebKit/LayoutTests/TestExpectations

 Issue 715555  has been merged into this issue.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ddeb6875e4f664f3d9d7941e6588405ac76fe045

commit ddeb6875e4f664f3d9d7941e6588405ac76fe045
Author: Alexei Filippov <alph@chromium.org>
Date: Wed Apr 26 20:40:36 2017

Mark more external/wpt tests as flaky

BUG=715718
TBR=pfeldman@chromium.org,pkalinnikov@chromium.org

Review-Url: https://codereview.chromium.org/2843123002 .
Cr-Commit-Position: refs/heads/master@{#467443}

[modify] https://crrev.com/ddeb6875e4f664f3d9d7941e6588405ac76fe045/third_party/WebKit/LayoutTests/TestExpectations

 Issue 715395  has been merged into this issue.

Leaving this up to sheriffs.

This has failed only once in the last 20 builds:
https://build.chromium.org/p/chromium.fyi/builders/WebKit%20Linux%20-%20RandomOrder

The error was:

--------------------------------- 8< ---------------------------------
webkitpy.common.system.log_utils: [DEBUG] Debug logging enabled.
root: [INFO] Running with isolated arguments
Traceback (most recent call last):
  File "/b/c/b/WebKit_Linux___RandomOrder/src/third_party/WebKit/Tools/Scripts/merge-layout-test-results", line 185, in <module>
    main(sys.argv[1:])
  File "/b/c/b/WebKit_Linux___RandomOrder/src/third_party/WebKit/Tools/Scripts/merge-layout-test-results", line 117, in main
    assert args.positional
AssertionError
WARNING:root:merge_cmd had non-zero return code: 1
step returned non-zero exit code: 1
--------------------------------- 8< ---------------------------------

Code error:
https://cs.chromium.org/chromium/src/third_party/WebKit/Tools/Scripts/merge-layout-test-results?rcl=fb645f073cb67786bb972c80edcde253f733b29c&l=117

Assigning to troopers.

tansell is the author of the merge-layout-test-results script, assigning.

Which run failed with that error? I also think that is a different issue to wpt being flaky?

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/7896098079172ab0561973ae0e616d542b67cd76

commit 7896098079172ab0561973ae0e616d542b67cd76
Author: Timothy Gu <timothygu@chromium.org>
Date: Sat Sep 08 03:38:34 2018

Mark two tests as no longer flaky

R=foolip@chromium.org, robertma@chromium.org

Bug: 715718
Change-Id: I7aca0973747d8bf1143fa4811e0432cc5a4fe369
Reviewed-on: https://chromium-review.googlesource.com/1214688
Commit-Queue: Timothy Gu <timothygu@chromium.org>
Commit-Queue: Philip Jägenstedt <foolip@chromium.org>
Reviewed-by: Philip Jägenstedt <foolip@chromium.org>
Cr-Commit-Position: refs/heads/master@{#589768}
[modify] https://crrev.com/7896098079172ab0561973ae0e616d542b67cd76/third_party/WebKit/LayoutTests/TestExpectations