Implement AudioScheduledSourceNode

third_party/WebKit/Source/modules/webaudio/AudioScheduledSourceNode.idl

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// See https://webaudio.github.io/web-audio-api/#ConstantSourceNode
+// See https://webaudio.github.io/web-audio-api/
 [
-    Constructor(BaseAudioContext context, optional ConstantSourceOptions options),
-    RaisesException=Constructor,
     ActiveScriptWrappable,
+    DependentLifetime

[haraken, 2016/11/30 23:54:07]

Do you know why we need to add [DependentLifetime]?

BTW, [DependentLifetime] is inherited, so you don't need to add it to
sub-classes of AudioScheduledSourceNode.

[hongchan, 2016/12/01 00:11:22]

Yes, according to this description, it seems like we need this.

https://chromium.googlesource.com/chromium/src/+/master/third_party/WebKit/So...
AudioScheduledSource has the |onended| callback (event handler) and also its own
lifetime with hasPendingActivity(). Doesn't it fit the bill?

[Raymond Toy, 2016/12/01 16:35:16]

  File
"/media/rtoy/ssd/chromium/src/third_party/WebKit/Source/bindings/scripts/v8_interface.py",
line 240, in interface_context
    '[DependentLifetime]: %s' % interface.name)
Exception: [ActiveScriptWrappable] interface must also specify
[DependentLifetime]: AudioScheduledSourceNode

 ]
-interface ConstantSourceNode : AudioSourceNode {
-    readonly attribute AudioParam offset;
+interface AudioScheduledSourceNode : AudioNode {
     [RaisesException] void start(optional double when);
     [RaisesException] void stop(optional double when);
     attribute EventHandler onended;
 };