diff -r 000000000000 -r 4f2f89ce4247 WebKit2/Platform/RunLoop.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebKit2/Platform/RunLoop.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2010 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 INC. AND ITS CONTRIBUTORS ``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 INC. OR ITS 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 "RunLoop.h"
+
+#include "WorkItem.h"
+#include <wtf/StdLibExtras.h>
+
+static RunLoop* s_mainRunLoop;
+
+void RunLoop::initializeMainRunLoop()
+{
+    if (s_mainRunLoop)
+        return;
+    s_mainRunLoop = RunLoop::current();
+}
+
+RunLoop* RunLoop::current()
+{
+    DEFINE_STATIC_LOCAL(WTF::ThreadSpecific<RunLoop>, runLoopData, ());
+    return &*runLoopData;
+}
+
+RunLoop* RunLoop::main()
+{
+    ASSERT(s_mainRunLoop);
+    return s_mainRunLoop;
+}
+
+void RunLoop::performWork()
+{
+    Vector<WorkItem*> workItemQueue;
+    {
+        MutexLocker locker(m_workItemQueueLock);
+        m_workItemQueue.swap(workItemQueue);
+    }
+
+    for (size_t i = 0; i < workItemQueue.size(); ++i) {
+        OwnPtr<WorkItem> item(workItemQueue[i]);
+        item->execute();
+    }
+}
+
+void RunLoop::scheduleWork(PassOwnPtr<WorkItem> item)
+{
+    MutexLocker locker(m_workItemQueueLock);
+    m_workItemQueue.append(item.leakPtr());
+
+    wakeUp();
+}