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diff --git a/webrtc/modules/utility/include/process_thread.h b/webrtc/modules/utility/include/process_thread.h
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+/*
+ *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_MODULES_UTILITY_INCLUDE_PROCESS_THREAD_H_
+#define WEBRTC_MODULES_UTILITY_INCLUDE_PROCESS_THREAD_H_
+
+#include "webrtc/typedefs.h"
+#include "webrtc/base/scoped_ptr.h"
+
+namespace webrtc {
+class Module;
+
+class ProcessTask {
+ public:
+  ProcessTask() {}
+  virtual ~ProcessTask() {}
+
+  virtual void Run() = 0;
+};
+
+class ProcessThread {
+ public:
+  virtual ~ProcessThread();
+
+  static rtc::scoped_ptr<ProcessThread> Create(const char* thread_name);
+
+  // Starts the worker thread.  Must be called from the construction thread.
+  virtual void Start() = 0;
+
+  // Stops the worker thread.  Must be called from the construction thread.
+  virtual void Stop() = 0;
+
+  // Wakes the thread up to give a module a chance to do processing right
+  // away.  This causes the worker thread to wake up and requery the specified
+  // module for when it should be called back. (Typically the module should
+  // return 0 from TimeUntilNextProcess on the worker thread at that point).
+  // Can be called on any thread.
+  virtual void WakeUp(Module* module) = 0;
+
+  // Queues a task object to run on the worker thread.  Ownership of the
+  // task object is transferred to the ProcessThread and the object will
+  // either be deleted after running on the worker thread, or on the
+  // construction thread of the ProcessThread instance, if the task did not
+  // get a chance to run (e.g. posting the task while shutting down or when
+  // the thread never runs).
+  virtual void PostTask(rtc::scoped_ptr<ProcessTask> task) = 0;
+
+  // Adds a module that will start to receive callbacks on the worker thread.
+  // Can be called from any thread.
+  virtual void RegisterModule(Module* module) = 0;
+
+  // Removes a previously registered module.
+  // Can be called from any thread.
+  virtual void DeRegisterModule(Module* module) = 0;
+};
+
+}  // namespace webrtc
+
+#endif // WEBRTC_MODULES_UTILITY_INCLUDE_PROCESS_THREAD_H_