Fix ALL the include guards.

fpdfsdk/include/pdfwindow/PWL_ComboBox.h

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
  
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
-#ifndef _PWL_COMBOBOX_H_
-#define _PWL_COMBOBOX_H_
+#ifndef FPDFSDK_INCLUDE_PDFWINDOW_PWL_COMBOBOX_H_
+#define FPDFSDK_INCLUDE_PDFWINDOW_PWL_COMBOBOX_H_
 
 #include "PWL_Edit.h"
 #include "PWL_ListBox.h"
 #include "PWL_Wnd.h"
 
 class CPWL_CBEdit : public CPWL_Edit
 {
 public:
         CPWL_CBEdit(){};
         virtual ~CPWL_CBEdit(){};
@@ skipping 89 matching lines @@
         FX_INT32                                        m_nPopupWhere;
         FX_INT32                                        m_nSelectItem;
         IPWL_Filler_Notify*                     m_pFillerNotify;
 
 public:
         void                                                    AttachFFLData(void* pData) {m_pFormFiller = pData;}
 private:
         void*                                                   m_pFormFiller;
 };
 
-#endif // !defined(AFX_PWL_COMBOBOX_H__9D6645F8_64AA_4806_94E8_95FDEDD39C17__INCLUDED_)
-
+#endif  // FPDFSDK_INCLUDE_PDFWINDOW_PWL_COMBOBOX_H_