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diff --git a/chrome/worker/webworker_stub_base.h b/chrome/worker/webworker_stub_base.h
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+++ b/chrome/worker/webworker_stub_base.h
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+// 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_WEB_WORKER_STUB_BASE_H_
+#define CHROME_WORKER_WEB_WORKER_STUB_BASE_H_
+
+#include "chrome/worker/webworkerclient_proxy.h"
+#include "ipc/ipc_channel.h"
+
+// This class is the common base class for both WebWorkerStub and
+// WebSharedWorkerStub and contains common setup/teardown functionality.
+class WebWorkerStubBase : public IPC::Channel::Listener {
+ public:
+  WebWorkerStubBase(int route_id);
+  virtual ~WebWorkerStubBase();
+
+  // Invoked when the WebWorkerClientProxy is shutting down.
+  void Shutdown();
+
+  // Called after terminating the worker context to make sure that the worker
+  // actually terminates (is not stuck in an infinite loop).
+  void EnsureWorkerContextTerminates();
+
+  WebWorkerClientProxy* client() { return &client_; }
+
+ private:
+  int route_id_;
+
+  // WebWorkerClient that responds to outgoing API calls from the worker object.
+  WebWorkerClientProxy client_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebWorkerStubBase);
+};
+
+#endif  // CHROME_WORKER_WEB_WORKER_STUB_BASE_H_