Delete unused GetBitMap() in fx_agg_driver

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 <memory>
@@ skipping 89 matching lines @@
   FX_BOOL RenderRasterizer(agg::rasterizer_scanline_aa& rasterizer,
                            uint32_t color,
                            FX_BOOL bFullCover,
                            FX_BOOL bGroupKnockout,
                            int alpha_flag,
                            void* pIccTransform);
 
   void SetClipMask(agg::rasterizer_scanline_aa& rasterizer);
 
   virtual uint8_t* GetBuffer() const;
-  const CFX_DIBitmap* GetBitmap() const;
 
  private:
   CFX_DIBitmap* m_pBitmap;
   std::unique_ptr<CFX_ClipRgn> m_pClipRgn;
   std::vector<std::unique_ptr<CFX_ClipRgn>> m_StateStack;
 #if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
   void* m_pPlatformGraphics;
 #endif
   int m_FillFlags;
   FX_BOOL m_bRgbByteOrder;
   CFX_DIBitmap* m_pOriDevice;
   FX_BOOL m_bGroupKnockout;
 };
 
 #endif  // CORE_FXGE_AGG_FX_AGG_DRIVER_H_