Move handle of HRTFDatabaseLoader to AudioListener.

Source/modules/webaudio/AudioListener.h

Index: Source/modules/webaudio/AudioListener.h
diff --git a/Source/modules/webaudio/AudioListener.h b/Source/modules/webaudio/AudioListener.h
index 214db390b700f960513c7b408f0d190be05c3f2e..fdd43a4d1ebb288dd4e412f3445fc2a5af0453be 100644
--- a/Source/modules/webaudio/AudioListener.h
+++ b/Source/modules/webaudio/AudioListener.h
@@ -38,6 +38,7 @@
 
 namespace WebCore {
 
+class HRTFDatabaseLoader;
 class PannerNode;
 
 // AudioListener maintains the state of the listener in the audio scene as defined in the OpenAL specification.
@@ -79,6 +80,9 @@ public:
     void addPanner(PannerNode*);
     void removePanner(PannerNode*);
 
+    void setHRTFDatabaseLoader(PassRefPtrWillBeRawPtr<HRTFDatabaseLoader>);

[tkent, 2014/07/16 23:32:25]

PassRefPtrWIllBeRawPtr should be PassRefPtr because HRTFDatabaseLoader is not a
garbage-collected class.

[KhNo, 2014/07/17 16:23:17]

Done.

+    HRTFDatabaseLoader* hrtfDatabaseLoader() { return m_hrtfDatabaseLoader.get(); }
+
     void trace(Visitor*) { }
 
 private:
@@ -100,9 +104,11 @@ private:
 
     // Synchronize a panner's process() with setting of the state of the listener.
     mutable Mutex m_listenerLock;
-
     // List for pannerNodes in context.
     Vector<PannerNode*> m_panners;
+    // HRTF DB loader for panner node. It should be allocated once on constructor of panner node,

[Raymond Toy, 2014/07/16 16:35:38]

How do you enforce that it is allocated only once when the PannerNode is
constructed?  Based on the constructor for the panner node below, this handle is
set for every new panner that is created.

[KhNo, 2014/07/17 16:23:17]

Yes, you right. I missed it. Basically it should be set only once.
I will add condition skip it if it is already existed.
Thanks for review.

+    // then keep handle for efficiant loading.

[Raymond Toy, 2014/07/16 16:35:38]

Typo: efficiant -> efficient

[KhNo, 2014/07/17 16:23:17]

Done.

+    RefPtrWillBeRawPtr<HRTFDatabaseLoader> m_hrtfDatabaseLoader;

[tkent, 2014/07/16 23:32:25]

RefPtrWillBeRawPtr should be RefPtr.

[KhNo, 2014/07/17 16:23:17]

Thanks for comment. :)
Done.

 };
 
 } // WebCore