Oilpan: HRTF dababase loader thread should be attached to Oilpan

Source/platform/audio/HRTFDatabaseLoader.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 53 matching lines @@
 
 HRTFDatabaseLoader::HRTFDatabaseLoader(float sampleRate)
     : m_databaseSampleRate(sampleRate)
 {
     ASSERT(isMainThread());
 }
 
 HRTFDatabaseLoader::~HRTFDatabaseLoader()
 {
     ASSERT(isMainThread());
-
-    MutexLocker locker(m_lock);

[tkent, 2014/11/10 06:27:54]

Please mention this change in the CL description.

[haraken, 2014/11/10 06:37:10]

Done.

     waitForLoaderThreadCompletion();
-    m_hrtfDatabase.clear();
 }
 
 void HRTFDatabaseLoader::load()
 {
     ASSERT(!isMainThread());
-    MutexLocker locker(m_lock);
-    if (!m_hrtfDatabase) {
-        // Load the default HRTF database.
-        m_hrtfDatabase = HRTFDatabase::create(m_databaseSampleRate);
+    m_thread->attachGC();
+
+    {
+        MutexLocker locker(m_lock);
+        if (!m_hrtfDatabase) {
+            // Load the default HRTF database.
+            m_hrtfDatabase = HRTFDatabase::create(m_databaseSampleRate);
+        }
     }
+
+    m_thread->detachGC();
 }
 
 void HRTFDatabaseLoader::loadAsynchronously()
 {
     ASSERT(isMainThread());
 
     MutexLocker locker(m_lock);
-    if (!m_hrtfDatabase && !m_databaseLoaderThread) {
+    if (!m_hrtfDatabase && !m_thread) {
         // 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_thread = WebThreadSupportingGC::create("HRTF database loader");
+        m_thread->postTask(new Task(WTF::bind(&HRTFDatabaseLoader::load, this)));
     }
 }
 
 bool HRTFDatabaseLoader::isLoaded()
 {
     MutexLocker locker(m_lock);
     return m_hrtfDatabase;
 }
 
 void HRTFDatabaseLoader::waitForLoaderThreadCompletion()
 {
-    m_databaseLoaderThread.clear();
+    m_thread.clear();
 }
 
 } // namespace blink
 
 #endif // ENABLE(WEB_AUDIO)