Remove ConditionVariableWrapper.

webrtc/system_wrappers/source/condition_variable_event_win.h

Index: webrtc/system_wrappers/source/condition_variable_event_win.h
diff --git a/webrtc/system_wrappers/source/condition_variable_event_win.h b/webrtc/system_wrappers/source/condition_variable_event_win.h
index cdcef7dcb83d5657f7fa81ea5a03cc9a84bb647f..8099ad5f91c4b8a5998c0319bd88161bd310fd05 100644
--- a/webrtc/system_wrappers/source/condition_variable_event_win.h
+++ b/webrtc/system_wrappers/source/condition_variable_event_win.h
@@ -13,17 +13,15 @@
 
 #include <windows.h>
 
-#include "webrtc/system_wrappers/include/condition_variable_wrapper.h"
-
 namespace webrtc {
 
-class ConditionVariableEventWin : public ConditionVariableWrapper {
+class ConditionVariableEventWin {
  public:
   ConditionVariableEventWin();
-  virtual ~ConditionVariableEventWin();
+  ~ConditionVariableEventWin();
 
-  void SleepCS(CriticalSectionWrapper& crit_sect);
-  bool SleepCS(CriticalSectionWrapper& crit_sect, unsigned long max_time_inMS);
+  void SleepCS(CRITICAL_SECTION* crit_sect);
+  bool SleepCS(CRITICAL_SECTION* crit_sect, unsigned long max_time_inMS);
   void Wake();
   void WakeAll();