Looks like a similar issue to  crbug.com/902064  and crbug.com/911135.

Link to first failing build: https://ci.chromium.org/p/chrome/builders/luci.chrome.ci/Win%207%20Nvidia%20GPU%20Perf/3436

Logs: 
(INFO) 2018-12-06 03:31:41,049 browser._LogBrowserInfo:127    scalarize_vec_and_mat_constructor_args
(INFO) 2018-12-06 03:31:41,049 browser._LogBrowserInfo:127    disabled_extension__gl__khr_blend_equation_advanced
(INFO) 2018-12-06 03:31:41,049 browser._LogBrowserInfo:127    disabled_extension__gl__khr_blend_equation_advanced_coherent
(INFO) 2018-12-06 03:31:41,059 cache_temperature.EnsurePageCacheTemperature:179  PageCacheTemperature: any
(INFO) 2018-12-06 03:31:41,082 action_runner._RunAction:61  START Page Action: NavigateAction(http://www.bing.com/)
(INFO) 2018-12-06 03:31:42,443 action_runner._RunAction:64  DONE Page Action: NavigateAction
(INFO) 2018-12-06 03:31:42,444 chrome_tracing_agent.RecordClockSyncMarker:180  Chrome version: 3633
(INFO) 2018-12-06 03:31:42,444 chrome_tracing_agent._RemoveTraceConfigFile:294  Remove trace config file in c:\b\s\w\itivntyt\tmpqh7xqi\chrome-trace-config.json
(ERROR) 2018-12-06 03:31:43,062 tracing_controller_backend.CollectAgentTraceData:316  Error when deleting c:\b\s\w\itivntyt\tmpmevwpv, will try again at exit.
Traceback (most recent call last):
  File "c:\b\s\w\ir\third_party\catapult\telemetry\telemetry\internal\platform\tracing_controller_backend.py", line 312, in CollectAgentTraceData
    os.remove(self._trace_log)
WindowsError: [Error 32] The process cannot access the file because it is being used by another process: 'c:\\b\\s\\w\\itivntyt\\tmpmevwpv'
(INFO) 2018-12-06 03:31:43,065 trace_data.Serialize:192  Trace sizes in bytes: {'traceEvents': 167959L, 'telemetry': 29095L}
(INFO) 2018-12-06 03:31:48,148 trace_data.Serialize:201  trace2html finished in 5.08 seconds.
(INFO) 2018-12-06 03:31:48,148 timeline_based_measurement._ComputeTimelineBasedMetrics:317  Starting to compute metrics on trace
(INFO) 2018-12-06 03:31:49,523 timeline_based_measurement._ComputeTimelineBasedMetrics:323  Processing resulting traces took 1.375 seconds
(ERROR) 2018-12-06 03:31:49,523 page_test_results.Fail:587  Failure recorded: TraceImportError: Unable to select a master clock domain because no path can be found from "TELEMETRY" to "WIN_QPC".
    at ClockSyncManager.ensureAllDomainsAreConnected_ (/tracing/model/clock_sync_manager.html:283:17)
    at ClockSyncManager.selectModelDomainId_ (/tracing/model/clock_sync_manager.html:254:12)
    at ClockSyncManager.getModelTimeTransformer (/tracing/model/clock_sync_manager.html:156:14)
    at TraceEventImporter.toModelTimeFromUs_ (/tracing/extras/importer/trace_event_importer.html:3368:42)
    at TraceEventImporter.processDurationEvent (/tracing/extras/importer/trace_event_importer.html:487:23)
    at TraceEventImporter.processEvent_ (/tracing/extras/importer/trace_event_importer.html:1238:16)
    at TraceEventImporter.importEvents (/tracing/extras/importer/trace_event_importer.html:1148:16)
    at importer (/tracing/importer/import.html:198:65)
    at task.subTask (/tracing/importer/import.html:145:32)
    at Task.run (/tracing/base/task.html:80:50)
(INFO) 2018-12-06 03:31:49,525 browser.Close:209  Closing browser (pid=10124) ...
(INFO) 2018-12-06 03:31:50,224 desktop_browser_backend._TryCooperativeShutdown:561  Successfully shut down browser cooperatively
(INFO) 2018-12-06 03:31:50,224 browser.Close:223  Browser is closed.

Seems to be fixed by https://chromium-review.googlesource.com/c/chromium/src/+/1359304