https://bugs.webkit.org/show_bug.cgi?id=116871

Source/WebCore:

Merge: https://chromium.googlesource.com/chromium/blink/+/ef37484162ddb95d677dcfdcdd778ec60590928b

Reviewed by Darin Adler.

Tests: webaudio/audionode-expected.txt:
       webaudio/audionode.html:

Add the requisite boilerplate to allow AudioNode to become an EventTarget. Remove
all that same boilerplate from ScriptProcessorNode now that it's base class
is an EventTarget.

* Modules/webaudio/AudioNode.cpp:
(WebCore::AudioNode::interfaceName): Added boilerplate.
(WebCore::AudioNode::scriptExecutionContext): Return the AudioContext's context.
(WebCore::AudioNode::processIfNecessary): Whitespace.
* Modules/webaudio/AudioNode.h:
* Modules/webaudio/AudioNode.idl: Make AudioNode an EventTarget.
* Modules/webaudio/ScriptProcessorNode.cpp: Remove EventTarget boilerplate.
* Modules/webaudio/ScriptProcessorNode.h: Ditto.
* Modules/webaudio/ScriptProcessorNode.idl: Ditto.
* dom/EventTarget.h: Mark AudioNode as an EventTarget.
* dom/EventTargetFactory.in: Ditto.

LayoutTests:

Reviewed by Darin Adler.

* webaudio/audionode-expected.txt:
* webaudio/audionode.html:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@150810 268f45cc-cd09-0410-ab3c-d52691b4dbfc