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 ded20b737c556530a2eada717f00a94a9f49c4d3..2b5db9c13261aac1147b046a708d57651006af65 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 blink {
 
@@ -71,6 +72,22 @@ void AudioListener::removePanner(PannerNode* panner)
     }
 }
 
+void AudioListener::createAndLoadHRTFDatabaseLoader(float sampleRate)
+{
+    if (!m_hrtfDatabaseLoader)
+        m_hrtfDatabaseLoader = HRTFDatabaseLoader::createAndLoadAsynchronouslyIfNecessary(sampleRate);
+}
+
+bool AudioListener::isHRTFDatabaseLoaded()
+{
+    return m_hrtfDatabaseLoader->isLoaded();
+}
+
+void AudioListener::waitForHRTFDatabaseLoaderThreadCompletion()
+{
+    m_hrtfDatabaseLoader->waitForLoaderThreadCompletion();
+}
+
 void AudioListener::markPannersAsDirty(unsigned type)
 {
     for (unsigned i = 0; i < m_panners.size(); ++i)