handle antialiased rendering as premultiplied

core/fpdfapi/render/cpdf_renderstatus.h

 // Copyright 2016 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_FPDFAPI_RENDER_CPDF_RENDERSTATUS_H_
 #define CORE_FPDFAPI_RENDER_CPDF_RENDERSTATUS_H_
 
 #include <memory>
@@ skipping 48 matching lines @@
   void RenderSingleObject(CPDF_PageObject* pObj, const CFX_Matrix* pObj2Device);
   bool ContinueSingleObject(CPDF_PageObject* pObj,
                             const CFX_Matrix* pObj2Device,
                             IFX_Pause* pPause);
   CPDF_RenderContext* GetContext() { return m_pContext; }
 
 #if defined _SKIA_SUPPORT_
   void DebugVerifyDeviceIsPreMultiplied() const;
 #endif
 
-#if defined _SKIA_SUPPORT_PATHS_
-  void UnPreMultiplyDevice();
-#endif
-
   CPDF_RenderOptions m_Options;
   CPDF_Dictionary* m_pFormResource;
   CPDF_Dictionary* m_pPageResource;
   CFX_ArrayTemplate<CPDF_Type3Font*> m_Type3FontCache;
 
  private:
   friend class CPDF_ImageRenderer;
   friend class CPDF_RenderContext;
 
   void ProcessClipPath(CPDF_ClipPath ClipPath, const CFX_Matrix* pObj2Device);
@@ skipping 90 matching lines @@
   bool m_bDropObjects;
   bool m_bStdCS;
   uint32_t m_GroupFamily;
   bool m_bLoadMask;
   CPDF_Type3Char* m_pType3Char;
   FX_ARGB m_T3FillColor;
   int m_curBlend;
 };
 
 #endif  // CORE_FPDFAPI_RENDER_CPDF_RENDERSTATUS_H_