All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=597646

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg0M24uwkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgsOylvgsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgkNv_9wgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg0M3W9wgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg0PrkowoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg0MuOrQkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg0I3z8wgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg0IvhoQkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg0MmtrAkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg0J7irgkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg0K7ntQsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg0OPP6QoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg0Iu_uAkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg0LrRpQkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg0Je27wkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg0NqF7ggM


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

chromium-rel-mac-retina
chromium-rel-mac10
chromium-rel-win10
chromium-rel-win8-dual

 Issue 597645  has been merged into this issue.

I believe this is due to cdc755c0552ebca53e2a86d678a3dd7f7f5dbcf6 and NotImplemented messages, fixed later by dpranke. No action needed, just FYI.