HRTFDatabaseLoader is not an absolute condition to run audioContext

Source/platform/audio/HRTFDatabaseLoader.cpp

Index: Source/platform/audio/HRTFDatabaseLoader.cpp
diff --git a/Source/platform/audio/HRTFDatabaseLoader.cpp b/Source/platform/audio/HRTFDatabaseLoader.cpp
index b67b91b376b908103868e81d37ce3ece6d7f3884..8dc1cf3a15bf5e28d80ce6110b985f29383419c0 100644
--- a/Source/platform/audio/HRTFDatabaseLoader.cpp
+++ b/Source/platform/audio/HRTFDatabaseLoader.cpp
@@ -45,12 +45,10 @@ PassRefPtr<HRTFDatabaseLoader> HRTFDatabaseLoader::createAndLoadAsynchronouslyIf
 {
     ASSERT(isMainThread());
 
-    RefPtr<HRTFDatabaseLoader> loader;
-
     if (!s_loaderMap)
         s_loaderMap = adoptPtr(new LoaderMap()).leakPtr();
 
-    loader = s_loaderMap->get(sampleRate);
+    RefPtr<HRTFDatabaseLoader> loader = s_loaderMap->get(sampleRate);
     if (loader) {
         ASSERT(sampleRate == loader->databaseSampleRate());
         return loader;