[CherryPick] [JSC] Remove custom WebAudio mark functions that we can generate instead.

[CherryPick] [JSC] Remove custom WebAudio mark functions that we can generate instead.

[Title] [CherryPick] [JSC] Remove custom WebAudio mark functions that we can generate instead.
[Issues] N/A
[Problem] WebAudio API Spec update
[Solution] Cherry picked.
[Cherry-Picker] Praveen R Jadhav <praveen.j@samsung.com>

[JSC] Remove custom WebAudio mark functions that we can generate instead.
<http://webkit.org/b/110976>

Reviewed by Eric Carlson.

Remove custom JSC mark functions for AudioContext and ScriptProcessorNode since they
are trivial to generate.

* Modules/webaudio/AudioContext.idl:
* Modules/webaudio/ScriptProcessorNode.idl:
* GNUmakefile.list.am:
* UseJSC.cmake:
* WebCore.xcodeproj/project.pbxproj:
* bindings/js/JSAudioContextCustom.cpp:
* bindings/js/JSScriptProcessorNodeCustom.cpp: Removed.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@145922 268f45cc-cd09-0410-ab3c-d52691b4dbfc

Conflicts:

	Source/WebCore/ChangeLog
	Source/WebCore/GNUmakefile.list.am
	Source/WebCore/Modules/webaudio/AudioContext.idl
	Source/WebCore/Modules/webaudio/ScriptProcessorNode.idl
	Source/WebCore/WebCore.xcodeproj/project.pbxproj

Change-Id: Ibd2e5227eb150e696182c5b042e95b3690b4f20d