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 1c730f892cbab6dc96b6a7ab032150f13854d82f..68e76126d0113349b3fb778872ec2b0cd4720624 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 createAndLoadHRTFDatabaseLoader(float);
+    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,
+    // then keep handle for efficient loading.

[Raymond Toy, 2014/07/17 17:25:45]

This comment is no longer valid.  Remove this?

+    RefPtr<HRTFDatabaseLoader> m_hrtfDatabaseLoader;
 };
 
 } // WebCore