All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=922488

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=842ef45f63449c76f6a682208a1e70f36a4cc13aa64ceb2a3c39d9435cf27a03


Bot(s) for this bug's original alert(s):

Win 7 Nvidia GPU Perf
Win 7 Perf
linux-perf
mac-10_12_laptop_low_end-perf
mac-10_13_laptop_high_end-perf

system_health.common_desktop - Benchmark documentation link:
  https://bit.ly/system-health-benchmarks

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/121371e0540000

😿 Pinpoint job stopped with an error.
https://pinpoint-dot-chromeperf.appspot.com/job/121371e0540000

All of the runs failed. The most common error (20/20 runs) was:
ReadValueError: Could not find values matching: {'story': u'load_accessibility:media:wikipedia', 'tir_label': u'load_accessibility_media', 'histogram': u'cpu_time_percentage'}

This looks like a return to normal levels after a glitch.