HRTFDatabaseLoader needs to acquire a lock when accessing m_hrtfDatabase

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 54 matching lines @@
 HRTFDatabaseLoader::HRTFDatabaseLoader(float sampleRate)
     : m_databaseSampleRate(sampleRate)
 {
     ASSERT(isMainThread());
 }
 
 HRTFDatabaseLoader::~HRTFDatabaseLoader()
 {
     ASSERT(isMainThread());
 
+    MutexLocker locker(m_lock);
     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);
     }
 }
 
 void HRTFDatabaseLoader::loadAsynchronously()
 {
     ASSERT(isMainThread());
 
-    MutexLocker locker(m_threadLock);
-
+    MutexLocker locker(m_lock);
     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)));
     }
 }
 
-bool HRTFDatabaseLoader::isLoaded() const
+bool HRTFDatabaseLoader::isLoaded()
 {
+    MutexLocker locker(m_lock);
     return m_hrtfDatabase;
 }
 
 void HRTFDatabaseLoader::waitForLoaderThreadCompletion()
 {
-    MutexLocker locker(m_threadLock);
     m_databaseLoaderThread.clear();
 }
 
 } // namespace blink
 
 #endif // ENABLE(WEB_AUDIO)