Fix ALL the include guards.

core/src/fxge/android/fx_android_font.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 _FX_ANDROID_FONT_H_
-#define _FX_ANDROID_FONT_H_
+#ifndef CORE_SRC_FXGE_ANDROID_FX_ANDROID_FONT_H_
+#define CORE_SRC_FXGE_ANDROID_FX_ANDROID_FONT_H_
+
 #if _FX_OS_ == _FX_ANDROID_
 class IFPF_FontMgr;
 class CFX_AndroidFontInfo : public IFX_SystemFontInfo
 {
 public:
     CFX_AndroidFontInfo();
     virtual void                Release()
     {
         delete this;
     }
 
     virtual     FX_BOOL         EnumFontList(CFX_FontMapper* pMapper);
 
     virtual void*               MapFont(int weight, FX_BOOL bItalic, int charset, int pitch_family, FX_LPCSTR face, FX_BOOL& bExact);
 
     virtual void*               GetFont(FX_LPCSTR face);
     virtual FX_DWORD    GetFontData(void* hFont, FX_DWORD table, FX_LPBYTE buffer, FX_DWORD size);
     virtual FX_BOOL             GetFaceName(void* hFont, CFX_ByteString& name);
     virtual FX_BOOL             GetFontCharset(void* hFont, int& charset);
 
     virtual void                DeleteFont(void* hFont);
     virtual void*       RetainFont(void* hFont);
     FX_BOOL                             Init(IFPF_FontMgr *pFontMgr);
 protected:
     IFPF_FontMgr                *m_pFontMgr;
 };
 #endif
-#endif
+
+#endif  // CORE_SRC_FXGE_ANDROID_FX_ANDROID_FONT_H_