Make CriticalSectionWrapper non-virtual

webrtc/system_wrappers/source/condition_variable_native_win.cc

 /*
  *  Copyright (c) 2013 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.
  */
 
+#include "webrtc/system_wrappers/include/critical_section_wrapper.h"
 #include "webrtc/system_wrappers/include/trace.h"
 #include "webrtc/system_wrappers/source/condition_variable_native_win.h"
-#include "webrtc/system_wrappers/source/critical_section_win.h"
 
 namespace webrtc {
 
 static HMODULE library = NULL;
 static bool win_support_condition_variables_primitive = false;
 
 PInitializeConditionVariable  PInitializeConditionVariable_;
 PSleepConditionVariableCS     PSleepConditionVariableCS_;
 PWakeConditionVariable        PWakeConditionVariable_;
 PWakeAllConditionVariable     PWakeAllConditionVariable_;
@@ skipping 55 matching lines @@
   PInitializeConditionVariable_(&condition_variable_);
   return true;
 }
 
 void ConditionVariableNativeWin::SleepCS(CriticalSectionWrapper& crit_sect) {
   SleepCS(crit_sect, INFINITE);
 }
 
 bool ConditionVariableNativeWin::SleepCS(CriticalSectionWrapper& crit_sect,
                                          unsigned long max_time_in_ms) {
-  CriticalSectionWindows* cs =
-      static_cast<CriticalSectionWindows*>(&crit_sect);
   BOOL ret_val = PSleepConditionVariableCS_(&condition_variable_,
-                                            &(cs->crit), max_time_in_ms);
+                                            &crit_sect.crit_, max_time_in_ms);
   return ret_val != 0;
 }
 
 void ConditionVariableNativeWin::Wake() {
   PWakeConditionVariable_(&condition_variable_);
 }
 
 void ConditionVariableNativeWin::WakeAll() {
   PWakeAllConditionVariable_(&condition_variable_);
 }
 
 }  // namespace webrtc