Fix ALL the include guards.

fpdfsdk/include/pdfwindow/PWL_Caret.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_CARET_H_
-#define _PWL_CARET_H_
+#ifndef FPDFSDK_INCLUDE_PDFWINDOW_PWL_CARET_H_
+#define FPDFSDK_INCLUDE_PDFWINDOW_PWL_CARET_H_
 
 #include "PWL_Wnd.h"
 
 struct PWL_CARET_INFO
 {
 public:
         PWL_CARET_INFO() : bVisible(FALSE), ptHead(0,0), ptFoot(0,0)
         {
         }
 
@@ skipping 24 matching lines @@
         CPDF_Rect                                       GetCaretRect() const;
 
         FX_BOOL                                         m_bFlash;
         CPDF_Point                                      m_ptHead;
         CPDF_Point                                      m_ptFoot;
         FX_FLOAT                                        m_fWidth;
         FX_INT32                                        m_nDelay;
         CPDF_Rect                                       m_rcInvalid;
 };
 
-#endif
-
+#endif  // FPDFSDK_INCLUDE_PDFWINDOW_PWL_CARET_H_