Fix ALL the include guards.

core/src/fxge/agg/include/fx_agg_driver.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_AGG_DEVICE_DRIVER_
-#define _FX_AGG_DEVICE_DRIVER_
+#ifndef FX_AGG_DRIVER_H_
+#define FX_AGG_DRIVER_H_
+
 #include "fxfx_agg_path_storage.h"
 #include "fxfx_agg_rasterizer_scanline_aa.h"
+
 class CAgg_PathData 
 {
 public:
     CAgg_PathData() {}
     ~CAgg_PathData() {}
     FX_NAMESPACE_DECLARE(agg, path_storage)     m_PathData;
     void                        BuildPath(const CFX_PathData* pPathData, const CFX_AffineMatrix* pObject2Device);
 };
 class CFX_AggDeviceDriver : public IFX_RenderDeviceDriver
 {
@@ skipping 90 matching lines @@
     CFX_PtrArray                m_StateStack;
     void*                               m_pPlatformGraphics;
     void*                               m_pPlatformBitmap;
     void*                               m_pDwRenderTartget;
     int                                 m_FillFlags;
     int                                 m_DitherBits;
     FX_BOOL                             m_bRgbByteOrder;
     CFX_DIBitmap*       m_pOriDevice;
     FX_BOOL             m_bGroupKnockout;
 };
-#endif
+
+#endif  // FX_AGG_DRIVER_H_