Is this something that just recently started?

Also what version of mac does this happen on and what GPU is on the bots?

This is pretty much broken for the recorded history of the flakiness dashboard:

https://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=webkit_layout_tests&tests=virtual%2Fgpu-rasterization%2Fimages%2Fimagemap-focus-ring-outline-color.html

Affected bots:
Mac10.10
Mac10.11
WebKit Mac10.12 (retina)

Sorry for the brevity... I am sheriffing and started off today with 37 bugs in the sheriff queue - too much to debug each broken issue in depth.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/1aa0ea6081983c67e6abdb1cce6bda5e4dee1cfc

commit 1aa0ea6081983c67e6abdb1cce6bda5e4dee1cfc
Author: Dominic Battre <battre@chromium.org>
Date: Mon Jun 04 14:56:20 2018

Updated test expectations of failing gpu-rasterization tests

TBR=egdaniel@chromium.org, ccameron@chromium.org

Bug:  849256 ,  849258 
Change-Id: Ic0726a6471f2acdae8c1e3a9b6102b5763492bce
Reviewed-on: https://chromium-review.googlesource.com/1085063
Reviewed-by: Dominic Battré <battre@chromium.org>
Commit-Queue: Dominic Battré <battre@chromium.org>
Cr-Commit-Position: refs/heads/master@{#564090}
[modify] https://crrev.com/1aa0ea6081983c67e6abdb1cce6bda5e4dee1cfc/third_party/WebKit/LayoutTests/TestExpectations

I've never seen that graph before so I'm sure I just don't know how to read it, but it looks like it has only failed once on mac and once on webkit (both 10.11 bots). When I click on any other color box (green, black, gray, etc.) everything in the logs is green with no failures. Am I seeing something wrong here? To me this specifically doesn't seem like a "very flaky" tests. 

Every light gray box means that it the test failed at least once. If you hover, you see e.g. "FAIL PASS". Every dark gray means that it failed multiple times.

Click on one of the gray boxes, click on build log, then in section "archive_webkit_tests_results" on layout_test_results (you get here for example: https://test-results.appspot.com/data/layout_results/WebKit_Mac10_11/34360/layout-test-results/results.html)
Then click on the Flaky button and on the flaky test.

Okay I can see it now. The green coloring when I went to the build log was confusing me and made me thing everything was fine.

I believe this is the same issue caused by,  http://crbug.com/847094 .

Marking as duplicate for now unless we find out they are different root causes.