allow Skia to be the default graphics engine

core/fxge/include/fx_ge.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_INCLUDE_FX_GE_H_
 #define CORE_FXGE_INCLUDE_FX_GE_H_
 
 #include "core/fxge/include/fx_dib.h"
@@ skipping 416 matching lines @@
               bool bRgbByteOrder = false,
               CFX_DIBitmap* pOriDevice = NULL,
               bool bGroupKnockout = false);
 
   bool Create(int width,
               int height,
               FXDIB_Format format,
               int dither_bits = 0,
               CFX_DIBitmap* pOriDevice = NULL);
 
+#ifdef _SKIA_SUPPORT_
+  bool AttachRecorder(SkPictureRecorder* recorder);
+  SkPictureRecorder* CreateRecorder(int size_x, int size_y);
+#endif
+
  protected:
   bool m_bOwnedBitmap;
 };
 
-class CFX_SkiaDevice : public CFX_RenderDevice {
- public:
-  CFX_SkiaDevice();
-  ~CFX_SkiaDevice() override;
-
-  FX_BOOL Attach(CFX_DIBitmap* pBitmap,
-                 int dither_bits = 0,
-                 FX_BOOL bRgbByteOrder = FALSE,
-                 CFX_DIBitmap* pOriDevice = NULL,
-                 FX_BOOL bGroupKnockout = FALSE);
-
-  FX_BOOL AttachRecorder(SkPictureRecorder* recorder);
-
-  FX_BOOL Create(int width,
-                 int height,
-                 FXDIB_Format format,
-                 int dither_bits = 0,
-                 CFX_DIBitmap* pOriDevice = NULL);
-
-  SkPictureRecorder* CreateRecorder(int size_x, int size_y);
-
- protected:
-  FX_BOOL m_bOwnedBitmap;
-};
-
 class IFX_RenderDeviceDriver {
  public:
   static IFX_RenderDeviceDriver* CreateFxgeDriver(
       CFX_DIBitmap* pBitmap,
       FX_BOOL bRgbByteOrder = FALSE,
       CFX_DIBitmap* pOriDevice = NULL,
       FX_BOOL bGroupKnockout = FALSE);
 
   virtual ~IFX_RenderDeviceDriver() {}
   virtual void Begin() {}
@@ skipping 246 matching lines @@
   void FindPSFontGlyph(CFX_FaceCache* pFaceCache,
                        CFX_Font* pFont,
                        const FXTEXT_CHARPOS& charpos,
                        int& ps_fontnum,
                        int& ps_glyphindex);
 
   void WritePSBinary(const uint8_t* data, int len);
 };
 
 #endif  // CORE_FXGE_INCLUDE_FX_GE_H_