FYI, it was reverted in r62b8e5996478c00373107e54311dd5966afddd4b

Might have something to do with it not going through the CQ?

I mean, that's why it landed, but it should still show up in SoM -- and it did for Chromium page on SoM.

We determine which builders are tree-breaking by examining the gatekeeper config file:
https://chromium.googlesource.com/chromium/tools/build/+/master/scripts/slave/gatekeeper_trees.json#37

<excerpt>

    "android": {
        "open-tree": false,
        "set-status": false,
        "masters": {
            "https://build.chromium.org/p/chromium.android": ["*"],
            "https://build.chromium.org/p/chromium": ["Android"],
            "https://build.chromium.org/p/chromium.webkit": [
                "Android Builder", "Webkit Android (Nexus4)"
            ],
            "https://build.chromium.org/p/chromium.linux": [
                "Android Builder (dbg)",
                "Android Tests (dbg)",
                "Android Builder",
                "Android Tests",
                "Android Clang Builder (dbg)",
                "Cast Android (dbg)"
            ],
            "https://build.chromium.org/p/chromium.fyi": [
                "Android Builder (dbg)"
            ]
        }
    },
</excerpt>


Android Arm64 Builder (dbg) is the only chromium.linux builder that appears to be left out, and anything in chromium.android should be alerted as tree-closing. Looks like we might have a bug in our gatekeeper config logic.

Quick update: Looks like we've been alerting on compile failures for most of these builders for a while now: 

https://bigquery.cloud.google.com/results/sheriff-o-matic:bquijob_42cdeab2_1604d8a502b?pli=1

I don't see any for Clang though. 

This issue has been Available for over a year. If it's no longer important or seems unlikely to be fixed, please consider closing it out. If it is important, please re-triage the issue.

Sorry for the inconvenience if the bug really should have been left as Available.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Is this still a problem?

Not sure; we'll refile if it comes back.