Initial checkin of the out of process worker implementation....

chrome/worker/worker_thread.h

Index: chrome/worker/worker_thread.h
===================================================================
--- chrome/worker/worker_thread.h	(revision 0)
+++ chrome/worker/worker_thread.h	(revision 0)
@@ -0,0 +1,31 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_WORKER_WORKER_THREAD_H_
+#define CHROME_WORKER_WORKER_THREAD_H_
+
+#include "base/thread.h"
+#include "chrome/common/child_thread.h"
+
+class GURL;
+
+class WorkerThread : public ChildThread {
+ public:
+  WorkerThread();
+  ~WorkerThread();
+
+  // Returns the one worker thread.
+  static WorkerThread* current() {
+    return static_cast<WorkerThread*>(ChildThread::current());
+  }
+
+ private:
+  virtual void OnControlMessageReceived(const IPC::Message& msg);
+
+  void OnCreateWorker(const GURL& url, int route_id);
+
+  DISALLOW_COPY_AND_ASSIGN(WorkerThread);
+};
+
+#endif  // CHROME_WORKER_WORKER_THREAD_H_