Oilpan: A thread that is not attached to Oilpan shouldn't create a CrossThreadPersistent

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 a64f0ddbfb449dafb27502d0c02b9e69d0fb795b..38d2d1763f95e30caa651f87b256ba5118a268a1 100644
--- a/Source/platform/audio/HRTFDatabaseLoader.cpp
+++ b/Source/platform/audio/HRTFDatabaseLoader.cpp
@@ -35,6 +35,7 @@
 #include "platform/Task.h"
 #include "public/platform/Platform.h"
 #include "wtf/MainThread.h"
+#include "wtf/UnretainedPtr.h"
 
 namespace blink {
 
@@ -94,7 +95,7 @@ void HRTFDatabaseLoader::loadAsynchronously()
     if (!m_hrtfDatabase && !m_databaseLoaderThread) {
         // Start the asynchronous database loading process.
         m_databaseLoaderThread = adoptPtr(Platform::current()->createThread("HRTF database loader"));
-        m_databaseLoaderThread->postTask(new Task(WTF::bind(&HRTFDatabaseLoader::load, this)));
+        m_databaseLoaderThread->postTask(new Task(WTF::bind(&HRTFDatabaseLoader::load, UnretainedPtr<HRTFDatabaseLoader>(this))));
     }
 }