All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=847442

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=d9948eabb928ddc641fe92db07077a0ae3ceacb18c1c14bde5e921ece95fe2e7


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

android-webview-nexus5X

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/12b3ecc6240000

📍 Found significant differences after each of 7 commits.
https://pinpoint-dot-chromeperf.appspot.com/job/12b3ecc6240000

Set error handler for audio service in MediaDevicesManager in a posted task. by guidou@chromium.org
https://chromium.googlesource.com/chromium/src/+/f0fecc81c6379ed1b0c530e60bc3e22420fb1f5b
1.047e+04 → 1.034e+04 (-126.6)

Fix SimpleTextPathLineLayout perf test so that layout doesn't get optimized away. by emilio@chromium.org
https://chromium.googlesource.com/chromium/src/+/ceb62691468baa50d951f625453f80f77e870c66
1.034e+04 → 117 (-1.022e+04)

Migrate ContentHashFetcher to SimpleURLLoader by tonikitoo@igalia.com
https://chromium.googlesource.com/chromium/src/+/27f8891c7cd9a86b2c92508cf6818726df4058d6
117.2 → 116.5 (-0.7375)

Call SetOutputDeviceForAec when SwitchOutputDevice is called. by ossu@chromium.org
https://chromium.googlesource.com/chromium/src/+/48711ad96078e5511e8a0b37f7b49d296236cb8e
116.1 → 114.9 (-1.211)

Determine the existence of touch handler by effective touch action by sunxd@chromium.org
https://chromium.googlesource.com/chromium/src/+/3e0ee34fa47a3558be52ac7e85e3e38d4a5eced5
114.7 → 116.8 (+2.036)

Password Manager: don't drop the information about existing forms on submit. by vasilii@chromium.org
https://chromium.googlesource.com/chromium/src/+/63317dd5fc2a3310dca673aafb45ee10511770bf
116.8 → 118.3 (+1.546)

Remove unused |ssl_info| in URLLoader::SendResponseToClient() by bashi@chromium.org
https://chromium.googlesource.com/chromium/src/+/84738d60242be7630e0e3deca6daeb31031d37c3
117.6 → 116.1 (-1.508)

Understanding performance regressions:
  http://g.co/ChromePerformanceRegressions

Given the test-case I'm pretty sure it's because of:

  https://chromium.googlesource.com/chromium/src/+/ceb62691468baa50d951f625453f80f77e870c66

Which is a test fix, as noted in the commit message.