Make CriticalSectionWrapper non-virtual

webrtc/system_wrappers/source/critical_section_win.h

Index: webrtc/system_wrappers/source/critical_section_win.h
diff --git a/webrtc/system_wrappers/source/critical_section_win.h b/webrtc/system_wrappers/source/critical_section_win.h
deleted file mode 100644
index 8268bc30179ae41e4a3d1d27fde62f05bad88c67..0000000000000000000000000000000000000000
--- a/webrtc/system_wrappers/source/critical_section_win.h
+++ /dev/null
@@ -1,38 +0,0 @@
-/*
- *  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_SOURCE_CRITICAL_SECTION_WIN_H_
-#define WEBRTC_SYSTEM_WRAPPERS_SOURCE_CRITICAL_SECTION_WIN_H_
-
-#include <windows.h>
-#include "webrtc/system_wrappers/include/critical_section_wrapper.h"
-#include "webrtc/typedefs.h"
-
-namespace webrtc {
-
-class CriticalSectionWindows : public CriticalSectionWrapper {
- public:
-  CriticalSectionWindows();
-
-  virtual ~CriticalSectionWindows();
-
-  virtual void Enter();
-  virtual void Leave();
-
- private:
-  CRITICAL_SECTION crit;
-
-  friend class ConditionVariableEventWin;
-  friend class ConditionVariableNativeWin;
-};
-
-}  // namespace webrtc
-
-#endif  // WEBRTC_SYSTEM_WRAPPERS_SOURCE_CRITICAL_SECTION_WIN_H_