Update web-platform-tests/webaudio from upstream.
Created attachment 400758 [details] Patch
This patch modifies the imported WPT tests. Please ensure that any changes on the tests are exported to WPT. Please see https://trac.webkit.org/wiki/WPTExportProcess
Created attachment 400762 [details] Patch
Comment on attachment 400762 [details] Patch rs=me
Created attachment 400778 [details] Patch
Committed r262405: <https://trac.webkit.org/changeset/262405> All reviewed patches have been landed. Closing bug and clearing flags on attachment 400778 [details].
<rdar://problem/63855895>