Copy Chrome's tests for ConstantSourceNode to WPT.
Until we coordinate better with other vendors, place everything in the
wpt/webaudio/chrome directory.
Changes from Chrome's version:
* audit.js:
* Deleted _logError function (but left the call in).
* Changed console.log (in a comment) to just log (to satisfy
presubmit check).
* Remove Audit.loadFileFromURL.
* audit-util.js:
* Deleted everything having to do with writing out WAV files.
Bug: 745778
Change-Id: Ib4adc73993a6c7e88c951b9cf213126b4396f9a1
Reviewed-on: https://chromium-review.googlesource.com/726268
Reviewed-by: Hongchan Choi <[email protected]>
Commit-Queue: Raymond Toy <[email protected]>
Cr-Commit-Position: refs/heads/master@{#511944}