All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=766593

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=74eb95f4005ef7a98e384b6f6047a77ad69b48930584e51a3968974978520dea


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

chromium-rel-mac11
chromium-rel-mac11-air
chromium-rel-mac12
win-high-dpi

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/12ef213fb80000

📍 Pinpoint job completed.
https://pinpoint-dot-chromeperf.appspot.com/job/12ef213fb80000

Use 8x MSAA rather than 4x MSAA when available.
By kbr@chromium.org · Sat Sep 16 21:07:21 2017
chromium@cdc786f5d2a2b538f4914ba0afbaee15634206b9

ash: Use DIP utils to convert from DIPs to pixels in fast ink.
By reveman@chromium.org · Sat Sep 16 23:16:32 2017
chromium@ee82805ddb0782e7c8940192ebd7ba602e2b3d54

ash: Fix exported fast ink texture leak.
By reveman@chromium.org · Sun Sep 17 00:29:14 2017
chromium@869d13439f5712193f27ded17a6300b67fd318f3

make_element_factory.py: Produce snake_case #includes if --snake-case-source-files is specified.
By tkent@chromium.org · Sun Sep 17 00:45:44 2017
chromium@e6fd255b48466f8890ce08b51b625c773d993c32

Filed https://github.com/catapult-project/catapult/issues/3892 for the Pinpoint job returning 4 culprits. From the graph, it looks like the first one is the interesting one.

Assigning kbr@ to see if this is an acceptable perf regression from his change.

Yes, it's expected that some machines (in particular those with integrated graphics) will see a performance regression from this change. The hope is that on the whole the quality improvement will make users happier. After reviewing the charts, I'm going to close this as WontFix, but we may need to revisit the heuristics once it reaches Stable.