Make code compile with clang_use_chrome_plugin (part II)

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 41 matching lines @@
                    uint32_t fill_color,
                    uint32_t stroke_color,
                    int fill_mode,
                    int blend_type) override;
   FX_BOOL SetPixel(int x, int y, uint32_t color) override;
   FX_BOOL FillRectWithBlend(const FX_RECT* pRect,
                             uint32_t fill_color,
                             int blend_type) override;
   FX_BOOL GetClipBox(FX_RECT* pRect) override;
   FX_BOOL GetDIBits(CFX_DIBitmap* pBitmap, int left, int top) override;
-  CFX_DIBitmap* GetBackDrop() override { return m_pOriDevice; }
+  CFX_DIBitmap* GetBackDrop() override;
   FX_BOOL SetDIBits(const CFX_DIBSource* pBitmap,
                     uint32_t color,
                     const FX_RECT* pSrcRect,
                     int left,
                     int top,
                     int blend_type) override;
   FX_BOOL StretchDIBits(const CFX_DIBSource* pBitmap,
                         uint32_t color,
                         int dest_left,
                         int dest_top,
@@ skipping 11 matching lines @@
                       int blend_type) override;
   FX_BOOL ContinueDIBits(void* handle, IFX_Pause* pPause) override;
   void CancelDIBits(void* handle) override;
   FX_BOOL DrawDeviceText(int nChars,
                          const FXTEXT_CHARPOS* pCharPos,
                          CFX_Font* pFont,
                          CFX_FontCache* pCache,
                          const CFX_Matrix* pObject2Device,
                          FX_FLOAT font_size,
                          uint32_t color) override;
-  int GetDriverType() const override { return 1; }
+  int GetDriverType() const override;
 
   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 { return m_pBitmap; }
+  const CFX_DIBitmap* GetBitmap() const;
 
  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;
   FX_BOOL m_bRgbByteOrder;
   CFX_DIBitmap* m_pOriDevice;
   FX_BOOL m_bGroupKnockout;
 };
 
 #endif  // CORE_FXGE_AGG_FX_AGG_DRIVER_H_