stderr:
[5508:1295:0426/235430:286024271392:ERROR:mojo_context_state.cc(183)] Failed to fetch source for module "third_party/WebKit/public/platform/modules/ballista/ballista.mojom"

What? That totally exists.

23:54:36.309 4771 worker/7 ballista/share-arity.html output stderr lines:
23:54:36.309 4771   [5508:1295:0426/235430:286024271392:ERROR:mojo_context_state.cc(183)] Failed to fetch source for module "third_party/WebKit/public/platform/modules/ballista/ballista.mojom"
23:54:36.311 4736 [6360/40772] ballista/share-arity.html failed unexpectedly (test timed out)
23:54:36.310 4771 worker/7 killing primary driver
23:54:36.310 4771 worker/7 killing secondary driver
23:54:36.310 4771 worker/7 ballista/share-arity.html failed:
23:54:36.310 4771 worker/7  test timed out
23:54:36.312 4771 worker/7 ballista/share-error.html started

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/dd70f8bd8dec6675360f79b1cdfcc8c98e87053c

commit dd70f8bd8dec6675360f79b1cdfcc8c98e87053c
Author: mgiuca <mgiuca@chromium.org>
Date: Wed Apr 27 07:17:09 2016

Revert of Added navigator.actions.share experimental web API (stub). (patchset #19 id:460001 of https://codereview.chromium.org/1806253002/ )

Reason for revert:
The LayoutTests added by this CL are failing on Mac bots.

BUG= 607086 

Original issue's description:
> Added navigator.actions.share experimental web API (stub).
>
> Requires the enable-experimental-web-platform-features flag. Currently
> does nothing; future CLs will implement this on Android as an
> experiment.
>
> BUG=595608
> CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_site_isolation
>
> Committed: https://crrev.com/4eeea499401e03bcf098437d92bf35cf10ba4675
> Cr-Commit-Position: refs/heads/master@{#390004}

TBR=mkwst@chromium.org,sammc@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=595608

Review URL: https://codereview.chromium.org/1924753002

Cr-Commit-Position: refs/heads/master@{#390009}

[delete] https://crrev.com/04a12d0b4696b365f89f7b867f360dc0cb1a1f60/third_party/WebKit/LayoutTests/ballista/resources/mock-ballista-service.js
[delete] https://crrev.com/04a12d0b4696b365f89f7b867f360dc0cb1a1f60/third_party/WebKit/LayoutTests/ballista/share-arity.html
[delete] https://crrev.com/04a12d0b4696b365f89f7b867f360dc0cb1a1f60/third_party/WebKit/LayoutTests/ballista/share-error.html
[delete] https://crrev.com/04a12d0b4696b365f89f7b867f360dc0cb1a1f60/third_party/WebKit/LayoutTests/ballista/share-success.html
[delete] https://crrev.com/04a12d0b4696b365f89f7b867f360dc0cb1a1f60/third_party/WebKit/LayoutTests/ballista/share-types.html
[modify] https://crrev.com/dd70f8bd8dec6675360f79b1cdfcc8c98e87053c/third_party/WebKit/LayoutTests/webexposed/global-interface-listing-expected.txt
[delete] https://crrev.com/04a12d0b4696b365f89f7b867f360dc0cb1a1f60/third_party/WebKit/Source/modules/ballista/Actions.cpp
[delete] https://crrev.com/04a12d0b4696b365f89f7b867f360dc0cb1a1f60/third_party/WebKit/Source/modules/ballista/Actions.h
[delete] https://crrev.com/04a12d0b4696b365f89f7b867f360dc0cb1a1f60/third_party/WebKit/Source/modules/ballista/Actions.idl
[delete] https://crrev.com/04a12d0b4696b365f89f7b867f360dc0cb1a1f60/third_party/WebKit/Source/modules/ballista/NavigatorActions.cpp
[delete] https://crrev.com/04a12d0b4696b365f89f7b867f360dc0cb1a1f60/third_party/WebKit/Source/modules/ballista/NavigatorActions.h
[delete] https://crrev.com/04a12d0b4696b365f89f7b867f360dc0cb1a1f60/third_party/WebKit/Source/modules/ballista/NavigatorActions.idl
[delete] https://crrev.com/04a12d0b4696b365f89f7b867f360dc0cb1a1f60/third_party/WebKit/Source/modules/ballista/OWNERS
[modify] https://crrev.com/dd70f8bd8dec6675360f79b1cdfcc8c98e87053c/third_party/WebKit/Source/modules/modules.gypi
[modify] https://crrev.com/dd70f8bd8dec6675360f79b1cdfcc8c98e87053c/third_party/WebKit/Source/platform/RuntimeEnabledFeatures.in
[modify] https://crrev.com/dd70f8bd8dec6675360f79b1cdfcc8c98e87053c/third_party/WebKit/public/BUILD.gn
[modify] https://crrev.com/dd70f8bd8dec6675360f79b1cdfcc8c98e87053c/third_party/WebKit/public/blink.gyp
[delete] https://crrev.com/04a12d0b4696b365f89f7b867f360dc0cb1a1f60/third_party/WebKit/public/platform/modules/ballista/OWNERS
[delete] https://crrev.com/04a12d0b4696b365f89f7b867f360dc0cb1a1f60/third_party/WebKit/public/platform/modules/ballista/ballista.mojom

> stderr: [5508:1295:0426/235430:286024271392:ERROR:mojo_context_state.cc(183)] Failed to fetch source for module
> "third_party/WebKit/public/platform/modules/ballista/ballista.mojom"

I saw you have fixed the Mac try bots issue in [1], Could you please share your experence？ I have a cl [2] also failed to fetch source module bitmap.mojom.


[1] https://chromium.googlesource.com/chromium/src/+/d123f9a4d82543ae3769094df5c4cac24cd2d693%5E%21/#F0
[2] https://codereview.chromium.org/2681913003/

Sorry, I really can't remember any details at all. Reading over this bug and the patch sets don't really shine any light on it.

It might have just been a transient failure that got fixed automatically. sammc@ do you remember any details?