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diff --git a/src/3rdparty/webkit/WebCore/dom/WorkerThread.cpp b/src/3rdparty/webkit/WebCore/dom/WorkerThread.cpp
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+++ b/src/3rdparty/webkit/WebCore/dom/WorkerThread.cpp
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+/*
+ * Copyright (C) 2008 Apple 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
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ *
+ */
+
+#include "config.h"
+
+#if ENABLE(WORKERS)
+
+#include "WorkerThread.h"
+
+#include "KURL.h"
+#include "PlatformString.h"
+#include "ScriptSourceCode.h"
+#include "ScriptValue.h"
+#include "Worker.h"
+#include "WorkerContext.h"
+#include "WorkerMessagingProxy.h"
+#include "WorkerTask.h"
+
+#include <utility>
+#include <wtf/Noncopyable.h>
+
+namespace WebCore {
+struct WorkerThreadStartupData : Noncopyable {
+public:
+    static std::auto_ptr<WorkerThreadStartupData> create(const KURL& scriptURL, const String& userAgent, const String& sourceCode)
+    {
+        return std::auto_ptr<WorkerThreadStartupData>(new WorkerThreadStartupData(scriptURL, userAgent, sourceCode));
+    }
+
+    KURL m_scriptURL;
+    String m_userAgent;
+    String m_sourceCode;
+private:
+    WorkerThreadStartupData(const KURL& scriptURL, const String& userAgent, const String& sourceCode);
+};
+
+WorkerThreadStartupData::WorkerThreadStartupData(const KURL& scriptURL, const String& userAgent, const String& sourceCode)
+    : m_scriptURL(scriptURL.copy())
+    , m_userAgent(userAgent.copy())
+    , m_sourceCode(sourceCode.copy())
+{
+}
+
+PassRefPtr<WorkerThread> WorkerThread::create(const KURL& scriptURL, const String& userAgent, const String& sourceCode, WorkerMessagingProxy* messagingProxy)
+{
+    return adoptRef(new WorkerThread(scriptURL, userAgent, sourceCode, messagingProxy));
+}
+
+WorkerThread::WorkerThread(const KURL& scriptURL, const String& userAgent, const String& sourceCode, WorkerMessagingProxy* messagingProxy)
+    : m_threadID(0)
+    , m_messagingProxy(messagingProxy)
+    , m_startupData(WorkerThreadStartupData::create(scriptURL, userAgent, sourceCode))
+{
+}
+
+WorkerThread::~WorkerThread()
+{
+}
+
+bool WorkerThread::start()
+{
+    // Mutex protection is necessary to ensure that m_threadID is initialized when the thread starts.
+    MutexLocker lock(m_threadCreationMutex);
+
+    if (m_threadID)
+        return true;
+
+    m_threadID = createThread(WorkerThread::workerThreadStart, this, "WebCore::Worker");
+
+    return m_threadID;
+}
+
+void* WorkerThread::workerThreadStart(void* thread)
+{
+    return static_cast<WorkerThread*>(thread)->workerThread();
+}
+
+void* WorkerThread::workerThread()
+{
+    {
+        MutexLocker lock(m_threadCreationMutex);
+        m_workerContext = WorkerContext::create(m_startupData->m_scriptURL, m_startupData->m_userAgent, this);
+    }
+
+    WorkerScriptController* script = m_workerContext->script();
+    script->evaluate(ScriptSourceCode(m_startupData->m_sourceCode, m_startupData->m_scriptURL));
+    // Free the startup data to cause its member variable deref's happen on the worker's thread (since
+    // all ref/derefs of these objects are happening on the thread at this point). Note that
+    // WorkerThread::~WorkerThread happens on a different thread where it was created.
+    m_startupData.clear();
+
+    m_messagingProxy->confirmWorkerThreadMessage(m_workerContext->hasPendingActivity()); // This wasn't really a message, but it counts as one for GC.
+
+    while (true) {
+        RefPtr<WorkerTask> task;
+        if (!m_messageQueue.waitForMessage(task))
+            break;
+
+        task->performTask(m_workerContext.get());
+    }
+
+    ThreadIdentifier threadID = m_threadID;
+
+    m_workerContext->clearScript();
+    ASSERT(m_workerContext->hasOneRef());
+    // The below assignment will destroy the context, which will in turn notify messaging proxy.
+    // We cannot let any objects survive past thread exit, because no other thread will run GC or otherwise destroy them.
+    m_workerContext = 0;
+    
+    // The thread object may be already destroyed from notification now, don't try to access "this".
+    detachThread(threadID);
+
+    return 0;
+}
+
+void WorkerThread::stop()
+{
+    // Mutex protection is necessary because stop() can be called before the context is fully created.
+    MutexLocker lock(m_threadCreationMutex);
+
+    // Ensure that tasks are being handled by thread event loop. If script execution weren't forbidden, a while(1) loop in JS could keep the thread alive forever.
+    if (m_workerContext)
+        m_workerContext->script()->forbidExecution();
+
+    // FIXME: Rudely killing the thread won't work when we allow nested workers, because they will try to post notifications of their destruction.
+    m_messageQueue.kill();
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(WORKERS)