GitLab

Spec PR (approved): https://github.com/WebAudio/web-audio-api/pull/1445

Based on the spec change, this CL moves audioWorklet from `window`
to `BaseAudioContext`. This alters the relationship between
BaseAudioContext, AudioWorkletMessagingProxy and AudioWorkletGlobalScope:

- Now AWMP/AWGS cannot exist without BaseAudioContext, this reduces
  the code complexity by removing checks.
- With this clear ownership, BaseAudioContext only needs to talk to
  AudioWorklet. AudioWorkletMessagingProxy can be hidden.
- When the script evaluation is completed, AWGS will notify the
  associated BaseAudioContext via AWObjectProxy - AWMessagingProxy.

Bug: 786542
Change-Id: I7b55fcacf304a4a25b527bcbcd285bef80881b8d
Reviewed-on: https://chromium-review.googlesource.com/779862
Commit-Queue: Hongchan Choi <hongchan@chromium.org>
Reviewed-by: Raymond Toy <rtoy@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Hiroki Nakagawa <nhiroki@chromium.org>
Cr-Commit-Position: refs/heads/master@{#521078}