Move handle of HRTFDatabaseLoader to AudioListener.

Source/modules/webaudio/AudioListener.cpp

Index: Source/modules/webaudio/AudioListener.cpp
diff --git a/Source/modules/webaudio/AudioListener.cpp b/Source/modules/webaudio/AudioListener.cpp
index 94466c9a19f43f53fb90ce37373392f2ece23a7e..6225ddb088b2c548d17a311494b754cd5b19d4f2 100644
--- a/Source/modules/webaudio/AudioListener.cpp
+++ b/Source/modules/webaudio/AudioListener.cpp
@@ -34,6 +34,7 @@
 
 #include "modules/webaudio/PannerNode.h"
 #include "platform/audio/AudioBus.h"
+#include "platform/audio/HRTFDatabaseLoader.h"
 
 namespace WebCore {
 
@@ -71,6 +72,12 @@ void AudioListener::removePanner(PannerNode* panner)
     }
 }
 
+void AudioListener::createAndLoadHRTFDatabaseLoader(float sampleRate)
+{
+    if (!m_hrtfDatabaseLoader)
+        m_hrtfDatabaseLoader = HRTFDatabaseLoader::createAndLoadAsynchronouslyIfNecessary(sampleRate);
+}
+
 void AudioListener::markPannersAsDirty(unsigned type)
 {
     for (unsigned i = 0; i < m_panners.size(); ++i)