yhirano@, you added this test relatively recently. Could you please investigate?

http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=serviceworker-echo-referrer-from-default-document.html

first flakiness: https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Win10/builds/12723

last stable green: http://build.chromium.org/p/chromium.webkit/builders/WebKit%20Win10/builds/12722

Removing from sheriff queue because a non-sheriff (yhirano@) has taken ownership and this doesn't need to stay on the sheriffs' radar.

Now it's flaky on Linux also (two failures in a wrong, no obvious cause).
https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Linux%20Leak/builds/21317
https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Linux%20Leak/builds/21318

Adding full test case name for better searching:
http/tests/fetch/referrer/serviceworker-echo-referrer-from-default-document.html

^in a wrong^in a row

and again twmo more Linux flakes:
https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Linux%20Leak/builds/15245
https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Linux%20Leak/builds/15252

I will disable there.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/1528936cab3bfbd56db87f04750c231968efef08

commit 1528936cab3bfbd56db87f04750c231968efef08
Author: mpearson <mpearson@chromium.org>
Date: Tue Jul 26 00:22:12 2016

Disable Flaky serviceworker-echo-referrer-from-default-document.html Test

NOTRY=1
TBR=yhirano@chromium.org

BUG= 630996 

Review-Url: https://codereview.chromium.org/2174423003
Cr-Commit-Position: refs/heads/master@{#407648}

[modify] https://crrev.com/1528936cab3bfbd56db87f04750c231968efef08/third_party/WebKit/LayoutTests/TestExpectations

I can reproduce the failure. The flakiness comes from serviceworker registration. When the serviceworker is already registered, the test passes.

When I reverted 36f52aca24a7fdf60ff33ada980e663e550b622b locally, the test failure is gone. yukishiino@, can you take a look?

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/981ce039703c0350086568b8c922bee8b8ca2761

commit 981ce039703c0350086568b8c922bee8b8ca2761
Author: yukishiino <yukishiino@chromium.org>
Date: Thu Jul 28 12:14:34 2016

binding: Disallows to run a function if its context is detached.

There are two contexts when about to run a ScheduledAction.
|this|'s context and the context of the function to be run.
If the latter context no longer has a valid V8PerContextData,
|self| returns null.
    function() { self.testRunner; } // self will be null

This issue has been there for a long time, but
https://crrev.com/2049493005 made it easy to happen.

This CL disallows to run a function if the function's context is
detached.  This is not the right fix, but close to the behavior
before https://crrev.com/2049493005 .

The right fix is that, per spec, |self| always returns the global
proxy object that never be null.  I.e. we need to support detached
windows.

BUG= 630996 

Review-Url: https://codereview.chromium.org/2191543002
Cr-Commit-Position: refs/heads/master@{#408376}

[modify] https://crrev.com/981ce039703c0350086568b8c922bee8b8ca2761/third_party/WebKit/Source/bindings/core/v8/ScheduledAction.cpp

yhirano@, could you take care of the rest?
I think we need to enable the test.

Thank you. I will do.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b0c153825786146160beb3fa7b5742ea12e3c04c

commit b0c153825786146160beb3fa7b5742ea12e3c04c
Author: yhirano <yhirano@chromium.org>
Date: Fri Jul 29 09:19:21 2016

Rewrite Fetch API referrer layout tests with service worker

BUG= 630996 

Review-Url: https://codereview.chromium.org/2192743002
Cr-Commit-Position: refs/heads/master@{#408607}

[modify] https://crrev.com/b0c153825786146160beb3fa7b5742ea12e3c04c/third_party/WebKit/LayoutTests/TestExpectations
[add] https://crrev.com/b0c153825786146160beb3fa7b5742ea12e3c04c/third_party/WebKit/LayoutTests/http/tests/fetch/referrer/resources/empty-referrer-origin.html
[add] https://crrev.com/b0c153825786146160beb3fa7b5742ea12e3c04c/third_party/WebKit/LayoutTests/http/tests/fetch/referrer/resources/empty.html
[delete] https://crrev.com/a42e8b81874bea9d61f5b8c99574f058263652a9/third_party/WebKit/LayoutTests/http/tests/fetch/referrer/resources/serviceworker-echo-referrer-from-default-document.html
[delete] https://crrev.com/a42e8b81874bea9d61f5b8c99574f058263652a9/third_party/WebKit/LayoutTests/http/tests/fetch/referrer/resources/serviceworker-from-origin-only-document.html
[modify] https://crrev.com/b0c153825786146160beb3fa7b5742ea12e3c04c/third_party/WebKit/LayoutTests/http/tests/fetch/referrer/serviceworker-echo-referrer-from-default-document.html
[modify] https://crrev.com/b0c153825786146160beb3fa7b5742ea12e3c04c/third_party/WebKit/LayoutTests/http/tests/fetch/referrer/serviceworker-from-origin-only-document.html
[modify] https://crrev.com/b0c153825786146160beb3fa7b5742ea12e3c04c/third_party/WebKit/LayoutTests/http/tests/fetch/resources/fetch-test-helpers.js