Fix ALL the include guards.

core/src/reflow/reflowedpage.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 _REFLOWED_PAGE_H
-#define _REFLOWED_PAGE_H
+#ifndef CORE_SRC_REFLOW_REFLOWEDPAGE_H_
+#define CORE_SRC_REFLOW_REFLOWEDPAGE_H_
+
 #include "../../include/reflow/reflowengine.h"
+
 #define GET_SIGNED(a) ( (a)>0 ? a/a : (a==0 ? 0 : -a/a) )
 class CRF_Data;
 class CRF_LineData;
 class CRF_CharData;
 class CRF_PathData;
 class CRF_ImageData;
 class CRF_Table;
 class CRF_AttrOperation;
 class CRF_OperationDate;
 class CPDF_ReflowedPage;
@@ skipping 341 matching lines @@
     }
     ~CRF_PathData() {};
     FX_BOOL                     m_bDecoration;
     CPDF_Path                   m_pPathData;
     CFX_AffineMatrix    m_pPath2Device;
     CPDF_GraphState             m_pGraphState;
     FX_ARGB             m_fill_argb;
     FX_ARGB             m_stroke_argb;
     int                 m_fill_mode;
 };
-#endif
+
+#endif  // CORE_SRC_REFLOW_REFLOWEDPAGE_H_