Remove default arguments from CFX_FxgeDevice.

core/fxge/agg/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 CORE_FXGE_AGG_FX_AGG_DRIVER_H_
 #define CORE_FXGE_AGG_FX_AGG_DRIVER_H_
 
 #include "core/fxge/include/fx_ge.h"
@@ skipping 10 matching lines @@
   ~CAgg_PathData() {}
   void BuildPath(const CFX_PathData* pPathData,
                  const CFX_Matrix* pObject2Device);
 
   agg::path_storage m_PathData;
 };
 
 class CFX_AggDeviceDriver : public IFX_RenderDeviceDriver {
  public:
   CFX_AggDeviceDriver(CFX_DIBitmap* pBitmap,
-                      int dither_bits,
                       FX_BOOL bRgbByteOrder,
                       CFX_DIBitmap* pOriDevice,
                       FX_BOOL bGroupKnockout);
   ~CFX_AggDeviceDriver() override;
 
   void InitPlatform();
   void DestroyPlatform();
 
   // IFX_RenderDeviceDriver
   int GetDeviceCaps(int caps_id) override;
@@ skipping 95 matching lines @@
   const CFX_DIBitmap* GetBitmap() const { return m_pBitmap; }
 
  private:
   CFX_DIBitmap* m_pBitmap;
   CFX_ClipRgn* m_pClipRgn;
   CFX_ArrayTemplate<CFX_ClipRgn*> 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  // CORE_FXGE_AGG_FX_AGG_DRIVER_H_