This is likely due to the auto-rebaseline: https://codereview.chromium.org/2036063002

Actually, maybe it is because the rebaseline did not include Mac 10.11 (it did change Mac 10.10, for example).

Ad #2 and #1 -- I don't know, really, not sure how the test expectations work there. Will just disable the test on Mac for now and move on with sheriffing.

I've been told on IRC that wkorman is a good contact in case this is indeed related to the auto-rebaseline.

wkorman@ -- could you please have a look? If you don't think this is auto-rebaseline-related, then please just say so, unassign from yourself and mark as Untriaged.

Thanks!

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/98bb6267e7954dde9082785b792bdcf815d51c30

commit 98bb6267e7954dde9082785b792bdcf815d51c30
Author: vabr <vabr@chromium.org>
Date: Fri Jun 03 11:25:40 2016

Disable tables/mozilla/bugs/ bug30692 .html on Mac10.11

The test fails on Mac 10.11 after auto-rebaseline, see the bug for more info.

TBR=glebl@chromium.org
BUG= 617033 

Added NOTRY, because there is a lot of other breakage in Blink currently.
NOTRY=true

Review-Url: https://codereview.chromium.org/2031243002
Cr-Commit-Position: refs/heads/master@{#397682}

[modify] https://crrev.com/98bb6267e7954dde9082785b792bdcf815d51c30/third_party/WebKit/LayoutTests/TestExpectations

The disabling did not work, apparently: https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Mac10.11%20%28retina%29/builds/3410. Trying to figure out why.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/3831cba2aad23496e608e5fe39b51cf20d1371ac

commit 3831cba2aad23496e608e5fe39b51cf20d1371ac
Author: vabr <vabr@chromium.org>
Date: Fri Jun 03 13:37:46 2016

Fix incorrect test specification

Apparently, the Retina specifier was missing when disabling
tables/mozilla/bugs/ bug30692 .html on
https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Mac10.11%20%28retina%29/.

NOTRY=true

TBR=mkwst@chromium.org
BUG= 617033 

Review-Url: https://codereview.chromium.org/2032093003
Cr-Commit-Position: refs/heads/master@{#397699}

[modify] https://crrev.com/3831cba2aad23496e608e5fe39b51cf20d1371ac/third_party/WebKit/LayoutTests/TestExpectations

This doesn't look fixed -- the TestExpectations line is still there.

Oh, incorrect grepping on my part. Never mind :p 

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/c065affd6e62ba7e1658ace14f0d1186f789f503

commit c065affd6e62ba7e1658ace14f0d1186f789f503
Author: Xianzhu Wang <wangxianzhu@chromium.org>
Date: Tue Jun 21 18:11:40 2016

Update expectations for  bug 621915 ,  617033 ,  621892 

BUG= 621915 , 617033 , 621892 

Review URL: https://codereview.chromium.org/2086723003 .

Cr-Commit-Position: refs/heads/master@{#401049}

[modify] https://crrev.com/c065affd6e62ba7e1658ace14f0d1186f789f503/third_party/WebKit/LayoutTests/TestExpectations

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/af7b3c880a41a64af7c6a567fa70884877794613

commit af7b3c880a41a64af7c6a567fa70884877794613
Author: Rebaseline Bot <blink-rebaseline-bot@chromium.org>
Date: Tue Jun 21 19:38:00 2016

Auto-rebaseline for r401049

https://chromium.googlesource.com/chromium/src/+/c065affd6

BUG= 617033 
TBR=wangxianzhu@chromium.org

Review URL: https://codereview.chromium.org/2082783004 .

Cr-Commit-Position: refs/heads/master@{#401080}

[modify] https://crrev.com/af7b3c880a41a64af7c6a567fa70884877794613/third_party/WebKit/LayoutTests/TestExpectations
[delete] https://crrev.com/098645c6ee78757f03819207645ff151b8edf01d/third_party/WebKit/LayoutTests/platform/mac-retina/tables/mozilla/bugs/bug30692-expected.png
[delete] https://crrev.com/098645c6ee78757f03819207645ff151b8edf01d/third_party/WebKit/LayoutTests/platform/mac-retina/tables/mozilla/bugs/bug30692-expected.txt