BluetoothInternalsTest.Startup_BluetoothInternals seems flaky on chromium.mac and chromium.win after crrev.com/2568283003 has been landed.

The flakiness dashboard would be helpful:
https://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=BluetoothInternalsTest


== log ==
BluetoothInternalsTest.Startup_BluetoothInternals (run #1):
[ RUN      ] BluetoothInternalsTest.Startup_BluetoothInternals
[29304:52763:1220/195330.430965:WARNING:mac_util.mm(222)] Failed to set backup exclusion for file '/private/var/folders/9x/6c6sv3cj4j53wzpzthbp4ksm0000gm/T/.org.chromium.Chromium.fSYIiZ/dUrIz7j/Default/History': Error Domain=NSOSStatusErrorDomain Code=-50 "The operation couldn?t be completed. (OSStatus error -50.)" (paramErr: error in user parameter list) (-50)
[29304:52763:1220/195330.445134:WARNING:mac_util.mm(222)] Failed to set backup exclusion for file '/private/var/folders/9x/6c6sv3cj4j53wzpzthbp4ksm0000gm/T/.org.chromium.Chromium.fSYIiZ/dUrIz7j/Default/Favicons': Error Domain=NSOSStatusErrorDomain Code=-50 "The operation couldn?t be completed. (OSStatus error -50.)" (paramErr: error in user parameter list) (-50)
[29308:771:1220/195330.624705:WARNING:vt_video_decode_accelerator_mac.cc(169)] Failed to create VTDecompressionSession: Error Domain=NSOSStatusErrorDomain Code=-8973 "The operation couldn?t be completed. (OSStatus error -8973.)" (codecOpenErr) (-8973)
[29308:771:1220/195330.626060:WARNING:vt_video_decode_accelerator_mac.cc(191)] Failed to create hardware VideoToolbox session
[29308:771:1220/195330.689288:ERROR:vt_video_encode_accelerator_mac.cc(518)]  VTCompressionSessionCreate failed: -12908
[29304:771:1220/195331.626462:INFO:CONSOLE(486)] "KeyboardEvent.Key polyfill not required", source: util.js (486)
[29312:771:1220/195331.732575:ERROR:render_process_impl.cc(212)] WebFrame LEAKED 1 TIMES
[29304:771:1220/195331.999707:INFO:CONSOLE(1209)] "Running TestCase BluetoothInternalsTest.Startup_BluetoothInternals", source: test_api.js (1209)
[29304:771:1220/195332.056853:INFO:CONSOLE(157)] "adapter", source: chrome://bluetooth-internals/bluetooth_internals.js (157)
[29304:771:1220/195348.814317:ERROR:CONSOLE(48)] "Mocha test failed: BluetoothInternalsUITest Snackbar_QueueThreeDismissAll
Error: Uncaught TypeError: Failed to execute 'removeChild' on 'Node': parameter 1 is not of type 'Node'. (chrome://bluetooth-internals/snackbar.js:191)
    at HTMLDivElement.<anonymous> (snackbar.js:98:16)
", source: mocha_adapter.js (48)
[29304:771:1220/195348.815100:ERROR:CONSOLE(191)] "Uncaught TypeError: Failed to execute 'removeChild' on 'Node': parameter 1 is not of type 'Node'.", source: chrome://bluetooth-internals/snackbar.js (191)
[29304:771:1220/195348.825533:ERROR:web_ui_test_handler.cc(76)] Test Errors: 1/14 tests had failed assertions.
[29304:771:1220/195348.825865:ERROR:web_ui_browser_test.cc(473)] CONDITION FAILURE: encountered javascript console error(s):
[29304:771:1220/195348.825910:ERROR:web_ui_browser_test.cc(475)] JS ERROR: '[29304:771:1220/195348.814317:ERROR:CONSOLE(48)] "Mocha test failed: BluetoothInternalsUITest Snackbar_QueueThreeDismissAll
Error: Uncaught TypeError: Failed to execute 'removeChild' on 'Node': parameter 1 is not of type 'Node'. (chrome://bluetooth-internals/snackbar.js:191)
    at HTMLDivElement.<anonymous> (snackbar.js:98:16)
", source: mocha_adapter.js (48)
'
[29304:771:1220/195348.825954:ERROR:web_ui_browser_test.cc(475)] JS ERROR: '[29304:771:1220/195348.815100:ERROR:CONSOLE(191)] "Uncaught TypeError: Failed to execute 'removeChild' on 'Node': parameter 1 is not of type 'Node'.", source: chrome://bluetooth-internals/snackbar.js (191)
'
[29304:771:1220/195348.825991:ERROR:web_ui_browser_test.cc(477)] JS call assumed failed, because JS console error(s) found.
gen/chrome/test/data/webui/bluetooth_internals_browsertest-gen.cc:33: Failure
Value of: RunJavascriptTestF( true, "BluetoothInternalsTest", "Startup_BluetoothInternals")
  Actual: false
Expected: true
[29304:771:1220/195348.827891:ERROR:CONSOLE(5067)] "Uncaught TypeError: Cannot set property 'state' of undefined", source: mocha.js (5067)
[29304:771:1220/195348.829691:ERROR:CONSOLE(48)] "Mocha test failed: BluetoothInternalsUITest Snackbar_QueueThreeDismissAll
Error: done() called multiple times
    at Suite.<anonymous> (bluetooth_internals_browsertest.js:526:5)
    at BluetoothInternalsTest.<anonymous> (bluetooth_internals_browsertest.js:242:3)
    at BluetoothInternalsTest.runTest (test_api.js:359:16)
    at TestCase.runTest (test_api.js:496:22)
    at TestCase.run (test_api.js:526:14)
    at RUN_TEST_F (test_api.js:1210:21)
", source: mocha_adapter.js (48)
[29304:771:1220/195348.915623:WARNING:ipc_message_attachment_set.cc(49)] MessageAttachmentSet destroyed with unconsumed attachments: 0/1
[29304:771:1220/195349.048033:WARNING:url_request_context_getter.cc(43)] URLRequestContextGetter leaking due to no owning thread.
[  FAILED  ] BluetoothInternalsTest.Startup_BluetoothInternals, where TypeParam =  and GetParam() =  (18853 ms)

BluetoothInternalsTest.Startup_BluetoothInternals (run #2):
[ RUN      ] BluetoothInternalsTest.Startup_BluetoothInternals
[30809:52251:1220/195535.303856:WARNING:mac_util.mm(222)] Failed to set backup exclusion for file '/private/var/folders/9x/6c6sv3cj4j53wzpzthbp4ksm0000gm/T/.org.chromium.Chromium.fSYIiZ/du3UUfB/Default/History': Error Domain=NSOSStatusErrorDomain Code=-50 "The operation couldn?t be completed. (OSStatus error -50.)" (paramErr: error in user parameter list) (-50)
[30809:52251:1220/195535.332785:WARNING:mac_util.mm(222)] Failed to set backup exclusion for file '/private/var/folders/9x/6c6sv3cj4j53wzpzthbp4ksm0000gm/T/.org.chromium.Chromium.fSYIiZ/du3UUfB/Default/Favicons': Error Domain=NSOSStatusErrorDomain Code=-50 "The operation couldn?t be completed. (OSStatus error -50.)" (paramErr: error in user parameter list) (-50)
[30812:771:1220/195535.516747:WARNING:vt_video_decode_accelerator_mac.cc(169)] Failed to create VTDecompressionSession: Error Domain=NSOSStatusErrorDomain Code=-8973 "The operation couldn?t be completed. (OSStatus error -8973.)" (codecOpenErr) (-8973)
[30812:771:1220/195535.518066:WARNING:vt_video_decode_accelerator_mac.cc(191)] Failed to create hardware VideoToolbox session
[30812:771:1220/195535.581791:ERROR:vt_video_encode_accelerator_mac.cc(518)]  VTCompressionSessionCreate failed: -12908
[30809:771:1220/195536.525505:INFO:CONSOLE(486)] "KeyboardEvent.Key polyfill not required", source: util.js (486)
[30813:771:1220/195536.634065:ERROR:render_process_impl.cc(212)] WebFrame LEAKED 1 TIMES
[30809:771:1220/195536.898467:INFO:CONSOLE(1209)] "Running TestCase BluetoothInternalsTest.Startup_BluetoothInternals", source: test_api.js (1209)
[30809:771:1220/195536.952127:INFO:CONSOLE(157)] "adapter", source: chrome://bluetooth-internals/bluetooth_internals.js (157)
[30809:771:1220/195553.744783:ERROR:CONSOLE(48)] "Mocha test failed: BluetoothInternalsUITest Snackbar_QueueThreeDismissAll
Error: Uncaught TypeError: Failed to execute 'removeChild' on 'Node': parameter 1 is not of type 'Node'. (chrome://bluetooth-internals/snackbar.js:191)
    at HTMLDivElement.<anonymous> (snackbar.js:98:16)
", source: mocha_adapter.js (48)
[30809:771:1220/195553.745981:ERROR:CONSOLE(191)] "Uncaught TypeError: Failed to execute 'removeChild' on 'Node': parameter 1 is not of type 'Node'.", source: chrome://bluetooth-internals/snackbar.js (191)
[30809:771:1220/195553.756670:ERROR:web_ui_test_handler.cc(76)] Test Errors: 1/14 tests had failed assertions.
[30809:771:1220/195553.757527:ERROR:web_ui_browser_test.cc(473)] CONDITION FAILURE: encountered javascript console error(s):
[30809:771:1220/195553.757557:ERROR:web_ui_browser_test.cc(475)] JS ERROR: '[30809:771:1220/195553.744783:ERROR:CONSOLE(48)] "Mocha test failed: BluetoothInternalsUITest Snackbar_QueueThreeDismissAll
Error: Uncaught TypeError: Failed to execute 'removeChild' on 'Node': parameter 1 is not of type 'Node'. (chrome://bluetooth-internals/snackbar.js:191)
    at HTMLDivElement.<anonymous> (snackbar.js:98:16)
", source: mocha_adapter.js (48)
'
[30809:771:1220/195553.757578:ERROR:web_ui_browser_test.cc(475)] JS ERROR: '[30809:771:1220/195553.745981:ERROR:CONSOLE(191)] "Uncaught TypeError: Failed to execute 'removeChild' on 'Node': parameter 1 is not of type 'Node'.", source: chrome://bluetooth-internals/snackbar.js (191)
'
[30809:771:1220/195553.757595:ERROR:web_ui_browser_test.cc(477)] JS call assumed failed, because JS console error(s) found.
gen/chrome/test/data/webui/bluetooth_internals_browsertest-gen.cc:33: Failure
Value of: RunJavascriptTestF( true, "BluetoothInternalsTest", "Startup_BluetoothInternals")
  Actual: false
Expected: true
[30809:771:1220/195553.759065:ERROR:CONSOLE(5067)] "Uncaught TypeError: Cannot set property 'state' of undefined", source: mocha.js (5067)
[30809:771:1220/195553.759975:ERROR:CONSOLE(48)] "Mocha test failed: BluetoothInternalsUITest Snackbar_QueueThreeDismissAll
Error: done() called multiple times
    at Suite.<anonymous> (bluetooth_internals_browsertest.js:526:5)
    at BluetoothInternalsTest.<anonymous> (bluetooth_internals_browsertest.js:242:3)
    at BluetoothInternalsTest.runTest (test_api.js:359:16)
    at TestCase.runTest (test_api.js:496:22)
    at TestCase.run (test_api.js:526:14)
    at RUN_TEST_F (test_api.js:1210:21)
", source: mocha_adapter.js (48)
[30809:771:1220/195553.933650:WARNING:url_request_context_getter.cc(43)] URLRequestContextGetter leaking due to no owning thread.
[  FAILED  ] BluetoothInternalsTest.Startup_BluetoothInternals, where TypeParam =  and GetParam() =  (18873 ms)

BluetoothInternalsTest.Startup_BluetoothInternals (run #3):
[ RUN      ] BluetoothInternalsTest.Startup_BluetoothInternals
[30815:52251:1220/195554.591858:WARNING:mac_util.mm(222)] Failed to set backup exclusion for file '/private/var/folders/9x/6c6sv3cj4j53wzpzthbp4ksm0000gm/T/.org.chromium.Chromium.fSYIiZ/d5WiyuJ/Default/History': Error Domain=NSOSStatusErrorDomain Code=-50 "The operation couldn?t be completed. (OSStatus error -50.)" (paramErr: error in user parameter list) (-50)
[30815:52251:1220/195554.623484:WARNING:mac_util.mm(222)] Failed to set backup exclusion for file '/private/var/folders/9x/6c6sv3cj4j53wzpzthbp4ksm0000gm/T/.org.chromium.Chromium.fSYIiZ/d5WiyuJ/Default/Favicons': Error Domain=NSOSStatusErrorDomain Code=-50 "The operation couldn?t be completed. (OSStatus error -50.)" (paramErr: error in user parameter list) (-50)
[30818:771:1220/195554.805444:WARNING:vt_video_decode_accelerator_mac.cc(169)] Failed to create VTDecompressionSession: Error Domain=NSOSStatusErrorDomain Code=-8973 "The operation couldn?t be completed. (OSStatus error -8973.)" (codecOpenErr) (-8973)
[30818:771:1220/195554.806890:WARNING:vt_video_decode_accelerator_mac.cc(191)] Failed to create hardware VideoToolbox session
[30818:771:1220/195554.872587:ERROR:vt_video_encode_accelerator_mac.cc(518)]  VTCompressionSessionCreate failed: -12908
[30815:771:1220/195555.827652:INFO:CONSOLE(486)] "KeyboardEvent.Key polyfill not required", source: util.js (486)
[30819:771:1220/195555.938757:ERROR:render_process_impl.cc(212)] WebFrame LEAKED 1 TIMES
[30815:771:1220/195556.201940:INFO:CONSOLE(1209)] "Running TestCase BluetoothInternalsTest.Startup_BluetoothInternals", source: test_api.js (1209)
[30815:771:1220/195556.272519:INFO:CONSOLE(157)] "adapter", source: chrome://bluetooth-internals/bluetooth_internals.js (157)
[30815:771:1220/195613.045203:ERROR:CONSOLE(48)] "Mocha test failed: BluetoothInternalsUITest Snackbar_QueueThreeDismissAll
Error: Uncaught TypeError: Failed to execute 'removeChild' on 'Node': parameter 1 is not of type 'Node'. (chrome://bluetooth-internals/snackbar.js:191)
    at HTMLDivElement.<anonymous> (snackbar.js:98:16)
", source: mocha_adapter.js (48)
[30815:771:1220/195613.045976:ERROR:CONSOLE(191)] "Uncaught TypeError: Failed to execute 'removeChild' on 'Node': parameter 1 is not of type 'Node'.", source: chrome://bluetooth-internals/snackbar.js (191)
[30815:771:1220/195613.055709:ERROR:web_ui_test_handler.cc(76)] Test Errors: 1/14 tests had failed assertions.
[30815:771:1220/195613.056519:ERROR:web_ui_browser_test.cc(473)] CONDITION FAILURE: encountered javascript console error(s):
[30815:771:1220/195613.056548:ERROR:web_ui_browser_test.cc(475)] JS ERROR: '[30815:771:1220/195613.045203:ERROR:CONSOLE(48)] "Mocha test failed: BluetoothInternalsUITest Snackbar_QueueThreeDismissAll
Error: Uncaught TypeError: Failed to execute 'removeChild' on 'Node': parameter 1 is not of type 'Node'. (chrome://bluetooth-internals/snackbar.js:191)
    at HTMLDivElement.<anonymous> (snackbar.js:98:16)
", source: mocha_adapter.js (48)
'
[30815:771:1220/195613.056572:ERROR:web_ui_browser_test.cc(475)] JS ERROR: '[30815:771:1220/195613.045976:ERROR:CONSOLE(191)] "Uncaught TypeError: Failed to execute 'removeChild' on 'Node': parameter 1 is not of type 'Node'.", source: chrome://bluetooth-internals/snackbar.js (191)
'
[30815:771:1220/195613.056590:ERROR:web_ui_browser_test.cc(477)] JS call assumed failed, because JS console error(s) found.
gen/chrome/test/data/webui/bluetooth_internals_browsertest-gen.cc:33: Failure
Value of: RunJavascriptTestF( true, "BluetoothInternalsTest", "Startup_BluetoothInternals")
  Actual: false
Expected: true
[30815:771:1220/195613.058030:ERROR:CONSOLE(5067)] "Uncaught TypeError: Cannot set property 'state' of undefined", source: mocha.js (5067)
[30815:771:1220/195613.060680:ERROR:CONSOLE(48)] "Mocha test failed: BluetoothInternalsUITest Snackbar_QueueThreeDismissAll
Error: done() called multiple times
    at Suite.<anonymous> (bluetooth_internals_browsertest.js:526:5)
    at BluetoothInternalsTest.<anonymous> (bluetooth_internals_browsertest.js:242:3)
    at BluetoothInternalsTest.runTest (test_api.js:359:16)
    at TestCase.runTest (test_api.js:496:22)
    at TestCase.run (test_api.js:526:14)
    at RUN_TEST_F (test_api.js:1210:21)
", source: mocha_adapter.js (48)
[30815:771:1220/195613.220487:WARNING:url_request_context_getter.cc(43)] URLRequestContextGetter leaking due to no owning thread.
[  FAILED  ] BluetoothInternalsTest.Startup_BluetoothInternals, where TypeParam =  and GetParam() =  (18886 ms)

BluetoothInternalsTest.Startup_BluetoothInternals (run #4):
[ RUN      ] BluetoothInternalsTest.Startup_BluetoothInternals
[30821:52251:1220/195613.878138:WARNING:mac_util.mm(222)] Failed to set backup exclusion for file '/private/var/folders/9x/6c6sv3cj4j53wzpzthbp4ksm0000gm/T/.org.chromium.Chromium.fSYIiZ/dq6hQKV/Default/History': Error Domain=NSOSStatusErrorDomain Code=-50 "The operation couldn?t be completed. (OSStatus error -50.)" (paramErr: error in user parameter list) (-50)
[30821:52251:1220/195613.903593:WARNING:mac_util.mm(222)] Failed to set backup exclusion for file '/private/var/folders/9x/6c6sv3cj4j53wzpzthbp4ksm0000gm/T/.org.chromium.Chromium.fSYIiZ/dq6hQKV/Default/Favicons': Error Domain=NSOSStatusErrorDomain Code=-50 "The operation couldn?t be completed. (OSStatus error -50.)" (paramErr: error in user parameter list) (-50)
[30824:771:1220/195614.113432:WARNING:vt_video_decode_accelerator_mac.cc(169)] Failed to create VTDecompressionSession: Error Domain=NSOSStatusErrorDomain Code=-8973 "The operation couldn?t be completed. (OSStatus error -8973.)" (codecOpenErr) (-8973)
[30824:771:1220/195614.114736:WARNING:vt_video_decode_accelerator_mac.cc(191)] Failed to create hardware VideoToolbox session
[30824:771:1220/195614.178621:ERROR:vt_video_encode_accelerator_mac.cc(518)]  VTCompressionSessionCreate failed: -12908
[30821:771:1220/195615.155784:INFO:CONSOLE(486)] "KeyboardEvent.Key polyfill not required", source: util.js (486)
[30825:771:1220/195615.258412:ERROR:render_process_impl.cc(212)] WebFrame LEAKED 1 TIMES
[30821:771:1220/195615.541424:INFO:CONSOLE(1209)] "Running TestCase BluetoothInternalsTest.Startup_BluetoothInternals", source: test_api.js (1209)
[30821:771:1220/195615.618458:INFO:CONSOLE(157)] "adapter", source: chrome://bluetooth-internals/bluetooth_internals.js (157)
[30821:771:1220/195632.372678:ERROR:CONSOLE(48)] "Mocha test failed: BluetoothInternalsUITest Snackbar_QueueThreeDismissAll
Error: Uncaught TypeError: Failed to execute 'removeChild' on 'Node': parameter 1 is not of type 'Node'. (chrome://bluetooth-internals/snackbar.js:191)
    at HTMLDivElement.<anonymous> (snackbar.js:98:16)
", source: mocha_adapter.js (48)
[30821:771:1220/195632.373476:ERROR:CONSOLE(191)] "Uncaught TypeError: Failed to execute 'removeChild' on 'Node': parameter 1 is not of type 'Node'.", source: chrome://bluetooth-internals/snackbar.js (191)
[30821:771:1220/195632.384368:ERROR:web_ui_test_handler.cc(76)] Test Errors: 1/14 tests had failed assertions.
[30821:771:1220/195632.385177:ERROR:web_ui_browser_test.cc(473)] CONDITION FAILURE: encountered javascript console error(s):
[30821:771:1220/195632.385208:ERROR:web_ui_browser_test.cc(475)] JS ERROR: '[30821:771:1220/195632.372678:ERROR:CONSOLE(48)] "Mocha test failed: BluetoothInternalsUITest Snackbar_QueueThreeDismissAll
Error: Uncaught TypeError: Failed to execute 'removeChild' on 'Node': parameter 1 is not of type 'Node'. (chrome://bluetooth-internals/snackbar.js:191)
    at HTMLDivElement.<anonymous> (snackbar.js:98:16)
", source: mocha_adapter.js (48)
'
[30821:771:1220/195632.385231:ERROR:web_ui_browser_test.cc(475)] JS ERROR: '[30821:771:1220/195632.373476:ERROR:CONSOLE(191)] "Uncaught TypeError: Failed to execute 'removeChild' on 'Node': parameter 1 is not of type 'Node'.", source: chrome://bluetooth-internals/snackbar.js (191)
'
[30821:771:1220/195632.385248:ERROR:web_ui_browser_test.cc(477)] JS call assumed failed, because JS console error(s) found.
gen/chrome/test/data/webui/bluetooth_internals_browsertest-gen.cc:33: Failure
Value of: RunJavascriptTestF( true, "BluetoothInternalsTest", "Startup_BluetoothInternals")
  Actual: false
Expected: true
[30821:771:1220/195632.386860:ERROR:CONSOLE(5067)] "Uncaught TypeError: Cannot set property 'state' of undefined", source: mocha.js (5067)
[30821:771:1220/195632.389670:ERROR:CONSOLE(48)] "Mocha test failed: BluetoothInternalsUITest Snackbar_QueueThreeDismissAll
Error: done() called multiple times
    at Suite.<anonymous> (bluetooth_internals_browsertest.js:526:5)
    at BluetoothInternalsTest.<anonymous> (bluetooth_internals_browsertest.js:242:3)
    at BluetoothInternalsTest.runTest (test_api.js:359:16)
    at TestCase.runTest (test_api.js:496:22)
    at TestCase.run (test_api.js:526:14)
    at RUN_TEST_F (test_api.js:1210:21)
", source: mocha_adapter.js (48)
[30821:771:1220/195632.544324:WARNING:url_request_context_getter.cc(43)] URLRequestContextGetter leaking due to no owning thread.
[  FAILED  ] BluetoothInternalsTest.Startup_BluetoothInternals, where TypeParam =  and GetParam() =  (18922 ms)