Fix ALL the include guards.

core/include/fpdftext/fpdf_text.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 _FPDF_TEXT_H_
-#define _FPDF_TEXT_H_
-#ifndef _FPDF_PARSER_
+#ifndef CORE_INCLUDE_FPDFTEXT_FPDF_TEXT_H_
+#define CORE_INCLUDE_FPDFTEXT_FPDF_TEXT_H_
+
+#include "../fpdfapi/fpdf_page.h"
+#include "../fpdfapi/fpdf_pageobj.h"
 #include "../fpdfapi/fpdf_parser.h"
-#endif
-#ifndef _FPDF_PAGEOBJ_H_
-#include "../fpdfapi/fpdf_pageobj.h"
-#endif
-#ifndef _FPDF_PAGE_
-#include "../fpdfapi/fpdf_page.h"
-#endif
+
 class CPDF_PageObjects;
 #define PDF2TXT_AUTO_ROTATE             1
 #define PDF2TXT_AUTO_WIDTH              2
 #define PDF2TXT_KEEP_COLUMN             4
 #define PDF2TXT_USE_OCR                 8
 #define PDF2TXT_INCLUDE_INVISIBLE       16
 void PDF_GetPageText(CFX_ByteStringArray& lines, CPDF_Document* pDoc, CPDF_Dictionary* pPage,
                      int iMinWidth, FX_DWORD flags);
 void PDF_GetPageText_Unicode(CFX_WideStringArray& lines, CPDF_Document* pDoc, CPDF_Dictionary* pPage,
                              int iMinWidth, FX_DWORD flags);
@@ skipping 135 matching lines @@
 public:
 
     virtual int                                 CountLinks() const = 0;
 
     virtual CFX_WideString              GetURL(int index) const = 0;
 
     virtual     void                            GetBoundedSegment(int index, int& start, int& count) const = 0;
 
     virtual void                                GetRects(int index, CFX_RectArray& rects) const = 0;
 };
-#endif
+
+#endif  // CORE_INCLUDE_FPDFTEXT_FPDF_TEXT_H_