Revert of Change WokerThread to use a blink::WebThread

Source/core/workers/WorkerRunLoop.h

Index: Source/core/workers/WorkerRunLoop.h
diff --git a/Source/core/workers/WorkerRunLoop.h b/Source/core/workers/WorkerRunLoop.h
new file mode 100644
index 0000000000000000000000000000000000000000..32ca0dfc5bd4706b12d47dcf8e50e32b30a5fd9e
--- /dev/null
+++ b/Source/core/workers/WorkerRunLoop.h
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2009 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:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * OWNER 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.
+ */
+
+#ifndef WorkerRunLoop_h
+#define WorkerRunLoop_h
+
+#include "core/dom/ExecutionContext.h"
+#include "core/dom/ExecutionContextTask.h"
+#include "public/platform/WebThread.h"
+#include "wtf/Functional.h"
+#include "wtf/MessageQueue.h"
+#include "wtf/OwnPtr.h"
+#include "wtf/PassOwnPtr.h"
+
+namespace blink {
+
+    class WorkerGlobalScope;
+    class WorkerSharedTimer;
+
+    class WorkerRunLoop {
+    public:
+        WorkerRunLoop();
+        ~WorkerRunLoop();
+
+        void setWorkerGlobalScope(WorkerGlobalScope*);
+
+        // Blocking call. Waits for tasks and timers, invokes the callbacks.
+        void run();
+
+        enum WaitMode { WaitForMessage, DontWaitForMessage };
+
+        // Waits for a single debugger task and returns.
+        MessageQueueWaitResult runDebuggerTask(WaitMode = WaitForMessage);
+
+        void terminate();
+        bool terminated() const { return m_messageQueue.killed(); }
+
+        WorkerGlobalScope* context() const { return m_context; }
+
+        // Returns true if the loop is still alive, false if it has been terminated.
+        bool postTask(PassOwnPtr<ExecutionContextTask>);
+
+        void postTaskAndTerminate(PassOwnPtr<ExecutionContextTask>);
+
+        // Returns true if the loop is still alive, false if it has been terminated.
+        bool postDebuggerTask(PassOwnPtr<ExecutionContextTask>);
+
+    private:
+        friend class RunLoopSetup;
+        MessageQueueWaitResult run(MessageQueue<blink::WebThread::Task>&, WaitMode);
+
+        // Runs any clean up tasks that are currently in the queue and returns.
+        // This should only be called when the context is closed or loop has been terminated.
+        void runCleanupTasks();
+
+        MessageQueue<blink::WebThread::Task> m_messageQueue;
+        MessageQueue<blink::WebThread::Task> m_debuggerMessageQueue;
+        OwnPtr<WorkerSharedTimer> m_sharedTimer;
+        WorkerGlobalScope* m_context;
+        int m_nestedCount;
+    };
+
+} // namespace blink
+
+#endif // WorkerRunLoop_h