Revert 144071 - Add a regenerate button to regenerate the password in Windows.

rlz/win/lib/lib_mutex.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // Mutex to guarantee serialization of RLZ key accesses.
 
 #ifndef RLZ_WIN_LIB_LIB_MUTEX_H_
 #define RLZ_WIN_LIB_LIB_MUTEX_H_
 
 #include <windows.h>
 
 namespace rlz_lib {
 
 class LibMutex {
  public:
   LibMutex();
   ~LibMutex();
 
   bool failed(void) { return !acquired_; }
 
  private:
   bool acquired_;
   HANDLE mutex_;
 };
 
 }  // namespace rlz_lib
 
 #endif  // RLZ_WIN_LIB_LIB_MUTEX_H_