Move webaudio to oilpan

Source/modules/webaudio/AudioParam.h

Index: Source/modules/webaudio/AudioParam.h
diff --git a/Source/modules/webaudio/AudioParam.h b/Source/modules/webaudio/AudioParam.h
index ba0276950abcc79ee412dfeea48991a927769c5e..ed25afabf79a89474311b8b59b50916893de2f99 100644
--- a/Source/modules/webaudio/AudioParam.h
+++ b/Source/modules/webaudio/AudioParam.h
@@ -43,14 +43,14 @@ namespace WebCore {
 
 class AudioNodeOutput;
 
-class AudioParam FINAL : public RefCounted<AudioParam>, public ScriptWrappable, public AudioSummingJunction {
+class AudioParam FINAL : public RefCountedWillBeGarbageCollectedFinalized<AudioParam>, public ScriptWrappable, public AudioSummingJunction {

[haraken, 2014/04/08 06:02:08]

You might want to move AudioSummingJunction to the heap in a follow-up CL.

[keishi, 2014/04/21 17:10:11]

I just tried to move AudioSummingJunction to the heap but I wasn't able to come
up with the right *WillBe* trick.

I think AudioSummingJunction and AudioParam both needs to be
GarbageCollectedFinalized but currently AudioParam is RefCounted.
If I make AudioSummingJunction NoBaseWillBeGarbageCollectedFinalized and
AudioParam RefCountedWillBeGarbageCollectedFinalized the compiler gives me an
error like error: deleted function '~AudioParam' cannot override a non-deleted
function

[haraken, 2014/04/22 05:37:19]

hmm, this is weird.

I think that in the end we want to have the following class structure:

class AudioParam : public AudioSummingJunction, public ScriptWrappable { ... };

class AudioSummingJunction : public
RefCountedWillBeGarbageCollectedFinalized<AudioSummingJunction> { ... };

Would it be possible to refactor the current class structure to:

class AudioParam : public AudioSummingJunction, public ScriptWrappable { ... };

class AudioNodeInput : public AudioSummingJunction { ... };

class AudioSummingJunction : public RefCounted<AudioSummingJunction> { ... };

before landing this CL?

 public:
     static const double DefaultSmoothingConstant;
     static const double SnapThreshold;
 
-    static PassRefPtr<AudioParam> create(AudioContext* context, const String& name, double defaultValue, double minValue, double maxValue, unsigned units = 0)
+    static PassRefPtrWillBeRawPtr<AudioParam> create(AudioContext* context, const String& name, double defaultValue, double minValue, double maxValue, unsigned units = 0)
     {
-        return adoptRef(new AudioParam(context, name, defaultValue, minValue, maxValue, units));
+        return adoptRefWillBeNoop(new AudioParam(context, name, defaultValue, minValue, maxValue, units));
     }
 
     // AudioSummingJunction
@@ -102,6 +102,8 @@ public:
     void connect(AudioNodeOutput*);
     void disconnect(AudioNodeOutput*);
 
+    void trace(Visitor*) { }
+
 protected:
     AudioParam(AudioContext* context, const String& name, double defaultValue, double minValue, double maxValue, unsigned units = 0)
         : AudioSummingJunction(context)