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

chrome/browser/worker_host/worker_service.h

Index: chrome/browser/worker_host/worker_service.h
===================================================================
--- chrome/browser/worker_host/worker_service.h	(revision 0)
+++ chrome/browser/worker_host/worker_service.h	(revision 0)
@@ -0,0 +1,52 @@
+// 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_BROWSER_WORKER_HOST__WORKER_SERVICE_H_
+#define CHROME_BROWSER_WORKER_HOST__WORKER_SERVICE_H_
+
+#include <list>
+
+#include "base/basictypes.h"
+#include "base/hash_tables.h"
+#include "base/singleton.h"
+#include "googleurl/src/gurl.h"
+
+namespace IPC {
+class Message;
+}
+
+class MessageLoop;
+class WorkerProcessHost;
+class ResourceMessageFilter;
+
+class WorkerService {
+ public:
+  // Returns the WorkerService singleton.
+  static WorkerService* GetInstance();
+
+  // Creates a dedicated worker.  Returns true on success.
+  bool CreateDedicatedWorker(const GURL &url,
+                             ResourceMessageFilter* filter,
+                             int renderer_route_id);
+
+  // Called by ResourceMessageFilter when a message from the renderer comes that
+  // should be forwarded to the worker process.
+  void ForwardMessage(const IPC::Message& message);
+
+  // Called by ResourceMessageFilter when it's destructed so that all the
+  // WorkerProcessHost objects can remove their pointers to it.
+  void RendererShutdown(ResourceMessageFilter* filter);
+
+ private:
+  friend struct DefaultSingletonTraits<WorkerService>;
+
+  WorkerService();
+  ~WorkerService();
+
+  int next_worker_route_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(WorkerService);
+};
+
+#endif  // CHROME_BROWSER_WORKER_HOST__WORKER_SERVICE_H_