Filed by: btara [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer.html#?job_id=305853357&repo=autoland
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/SI89pGaJQeemrZl2kDZOdg/runs/0/artifacts/public/logs/live_backing.log
Reftest URL: https://hg.mozilla.org/mozilla-central/raw-file/tip/layout/tools/reftest/reftest-analyzer.xhtml#logurl=https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/SI89pGaJQeemrZl2kDZOdg/runs/0/artifacts/public/logs/live_backing.log&only_show_unexpected=1

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[task 2020-06-10T21:03:32.845Z] 21:03:32     INFO - Entering test bound topSitesDisabled
[task 2020-06-10T21:03:32.845Z] 21:03:32     INFO - TEST-PASS | browser/components/urlbar/tests/browser/browser_top_sites.js | check urlbar panel is not open - true == true - 
[task 2020-06-10T21:03:32.846Z] 21:03:32     INFO - Buffered messages logged at 21:02:52
[task 2020-06-10T21:03:32.846Z] 21:03:32     INFO - TEST-PASS | browser/components/urlbar/tests/browser/browser_top_sites.js | check urlbar panel is not open - true == true - 
[task 2020-06-10T21:03:32.847Z] 21:03:32     INFO - TEST-PASS | browser/components/urlbar/tests/browser/browser_top_sites.js | check urlbar panel is not open - true == true - 
[task 2020-06-10T21:03:32.847Z] 21:03:32     INFO - TEST-PASS | browser/components/urlbar/tests/browser/browser_top_sites.js | check urlbar panel is not open - true == true - 
[task 2020-06-10T21:03:32.848Z] 21:03:32     INFO - Buffered messages logged at 21:02:53
[task 2020-06-10T21:03:32.848Z] 21:03:32     INFO - TEST-PASS | browser/components/urlbar/tests/browser/browser_top_sites.js | check urlbar panel is not open - true == true - 
[task 2020-06-10T21:03:32.849Z] 21:03:32     INFO - TEST-PASS | browser/components/urlbar/tests/browser/browser_top_sites.js | check urlbar panel is not open - true == true - 
[task 2020-06-10T21:03:32.849Z] 21:03:32     INFO - Buffered messages logged at 21:02:54
[task 2020-06-10T21:03:32.850Z] 21:03:32     INFO - TEST-PASS | browser/components/urlbar/tests/browser/browser_top_sites.js | check urlbar panel is not open - true == true - 
[task 2020-06-10T21:03:32.852Z] 21:03:32     INFO - TEST-PASS | browser/components/urlbar/tests/browser/browser_top_sites.js | check urlbar panel is not open - true == true - 
[task 2020-06-10T21:03:32.853Z] 21:03:32     INFO - Buffered messages logged at 21:02:55
[task 2020-06-10T21:03:32.853Z] 21:03:32     INFO - TEST-PASS | browser/components/urlbar/tests/browser/browser_top_sites.js | check urlbar panel is not open - true == true - 
[task 2020-06-10T21:03:32.854Z] 21:03:32     INFO - Console message: [JavaScript Warning: "Key event not available on some keyboard layouts: key=“r” modifiers=“accel,alt” id=“key_toggleReaderMode”" {file: "chrome://mochikit/content/tests/SimpleTest/EventUtils.js" line: 1099}]
[task 2020-06-10T21:03:32.855Z] 21:03:32     INFO - Console message: [JavaScript Warning: "Key event not available on some keyboard layouts: key=“i” modifiers=“accel,alt,shift” id=“key_browserToolbox”" {file: "chrome://mochikit/content/tests/SimpleTest/EventUtils.js" line: 1099}]
[task 2020-06-10T21:03:32.856Z] 21:03:32     INFO - TEST-PASS | browser/components/urlbar/tests/browser/browser_top_sites.js | check urlbar panel is not open - true == true - 
[task 2020-06-10T21:03:32.856Z] 21:03:32     INFO - Buffered messages finished
[task 2020-06-10T21:03:32.857Z] 21:03:32     INFO - TEST-UNEXPECTED-FAIL | browser/components/urlbar/tests/browser/browser_top_sites.js | Test timed out - 
[task 2020-06-10T21:03:32.858Z] 21:03:32     INFO - Leaving test bound topSitesDisabled
[task 2020-06-10T21:03:32.858Z] 21:03:32     INFO - Entering test bound topSitesNumber
[task 2020-06-10T21:03:32.859Z] 21:03:32     INFO - GECKO(3942) | MEMORY STAT | vsize 3005MB | residentFast 308MB | heapAllocated 115MB
[task 2020-06-10T21:03:32.860Z] 21:03:32     INFO - TEST-OK | browser/components/urlbar/tests/browser/browser_top_sites.js | took 45153ms
[task 2020-06-10T21:03:32.861Z] 21:03:32     INFO - checking window state
[task 2020-06-10T21:03:32.885Z] 21:03:32     INFO - TEST-START | browser/components/urlbar/tests/browser/browser_top_sites.js
[task 2020-06-10T21:03:32.890Z] 21:03:32     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-06-10T21:03:32.892Z] 21:03:32     INFO - Buffered messages logged at 21:03:32
[task 2020-06-10T21:03:32.892Z] 21:03:32     INFO - Entering test bound init
[task 2020-06-10T21:03:32.893Z] 21:03:32     INFO - Buffered messages finished
[task 2020-06-10T21:03:32.895Z] 21:03:32     INFO - TEST-UNEXPECTED-FAIL | browser/components/urlbar/tests/browser/browser_top_sites.js | Uncaught exception received from previously timed out test - at chrome://mochitests/content/browser/browser/components/urlbar/tests/browser/browser_top_sites.js:448 - ReferenceError: PlacesTestUtils is not defined
[task 2020-06-10T21:03:32.896Z] 21:03:32     INFO - Stack trace:
[task 2020-06-10T21:03:32.896Z] 21:03:32     INFO - topSitesNumber@chrome://mochitests/content/browser/browser/components/urlbar/tests/browser/browser_top_sites.js:448:5
[task 2020-06-10T21:03:32.897Z] 21:03:32     INFO - Async*Tester_execTest/<@chrome://mochikit/content/browser-test.js:1064:34
[task 2020-06-10T21:03:32.898Z] 21:03:32     INFO - async*Tester_execTest@chrome://mochikit/content/browser-test.js:1104:11
[task 2020-06-10T21:03:32.898Z] 21:03:32     INFO - nextTest/<@chrome://mochikit/content/browser-test.js:921:14
[task 2020-06-10T21:03:32.899Z] 21:03:32     INFO - SimpleTest.waitForFocus/waitForFocusInner/focusedOrLoaded/<@chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:918:23
[task 2020-06-10T21:03:33.363Z] 21:03:33     INFO - Leaving test bound init

let's see if I can figure this out.

Set release status flags based on info from the regressing bug 1631848

This seems to timeout when it closes the separate window and the urlbar panel. My only theory so far is that when the PB window closes we move focus back to the main window and retained results reopen the panel, while we try to close it, so maybe there's a race where the panel stays open and promisePopupClose hangs indefinitely. I am not sure why bug 1631848 would make a difference, but of course there could just be a time skew.
Though this should be verified by logging on Try.

I confirmed on Try that we hang on waiting the panel to close, thus probably my theory is sound.

Also cleans up some test boilerplate:

1. avoid waitForFocus passing in urlbar tests
2. avoid useless window.gSomething
3. avoid useless UrlbarTestUtils imports

https://hg.mozilla.org/mozilla-central/rev/3add3a174755