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diff --git a/src/system_wrappers/interface/cpu_wrapper.h b/src/system_wrappers/interface/cpu_wrapper.h
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+++ b/src/system_wrappers/interface/cpu_wrapper.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_SYSTEM_WRAPPERS_INTERFACE_CPU_WRAPPER_H_
+#define WEBRTC_SYSTEM_WRAPPERS_INTERFACE_CPU_WRAPPER_H_
+
+#include "typedefs.h"
+
+namespace webrtc {
+class CpuWrapper
+{
+public:
+    static WebRtc_UWord32 DetectNumberOfCores();
+
+    static CpuWrapper* CreateCpu();
+    virtual ~CpuWrapper() {}
+
+    // Returns the average CPU usage for all processors. The CPU usage can be
+    // between and including 0 to 100 (%)
+    virtual WebRtc_Word32 CpuUsage() = 0;
+    virtual WebRtc_Word32 CpuUsage(WebRtc_Word8* processName,
+                                   WebRtc_UWord32 length) = 0;
+    virtual WebRtc_Word32 CpuUsage(WebRtc_UWord32  dwProcessID) = 0;
+
+    // The CPU usage per core is returned in cpu_usage. The CPU can be between
+    // and including 0 to 100 (%)
+    // Note that the pointer passed as cpu_usage is redirected to a local member
+    // of the CPU wrapper.
+    // numCores is the number of cores in the cpu_usage array.
+    virtual WebRtc_Word32 CpuUsageMultiCore(WebRtc_UWord32& numCores,
+                                            WebRtc_UWord32*& cpu_usage) = 0;
+
+    virtual void Reset() = 0;
+    virtual void Stop() = 0;
+
+protected:
+    CpuWrapper() {}
+
+private:
+    static WebRtc_UWord32 _numberOfCores;
+
+};
+} // namespace webrtc
+#endif // WEBRTC_SYSTEM_WRAPPERS_INTERFACE_CPU_WRAPPER_H_