The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a8b78a341cd4b8d3aff4a4a6ba0011c6abf45f98

commit a8b78a341cd4b8d3aff4a4a6ba0011c6abf45f98
Author: hongchan <hongchan@chromium.org>
Date: Mon Feb 13 23:55:26 2017

Fix flakiness in webaudio/Oscillator/oscillator-late-start.html

This test uses a hacky method to trigger a function after the render
starts on OfflineAudioContext. This CL replaces such method of using
'onstatechange' with the suspension of OfflineAudioContext.

BUG= 691425 
TEST=
webaudio/Oscillator/oscillator-late-start.html

Review-Url: https://codereview.chromium.org/2693853004
Cr-Commit-Position: refs/heads/master@{#450158}

[modify] https://crrev.com/a8b78a341cd4b8d3aff4a4a6ba0011c6abf45f98/third_party/WebKit/LayoutTests/webaudio/Oscillator/oscillator-late-start-expected.txt
[modify] https://crrev.com/a8b78a341cd4b8d3aff4a4a6ba0011c6abf45f98/third_party/WebKit/LayoutTests/webaudio/Oscillator/oscillator-late-start.html
[modify] https://crrev.com/a8b78a341cd4b8d3aff4a4a6ba0011c6abf45f98/third_party/WebKit/LayoutTests/webaudio/resources/late-start-testing.js

Thanks. I confirmed that it's no longer flaky on the dashboard.

tyoshino@ Thanks for catching this!