allow Skia to be the default graphics engine

fpdfsdk/fpdfformfill.cpp

Index: fpdfsdk/fpdfformfill.cpp
diff --git a/fpdfsdk/fpdfformfill.cpp b/fpdfsdk/fpdfformfill.cpp
index 9f4e2944ca4f680a1e31d0ec4ec78ae6aefbc4a7..153c1057a576b9e4836c6ac7d2e22ab514c537fb 100644
--- a/fpdfsdk/fpdfformfill.cpp
+++ b/fpdfsdk/fpdfformfill.cpp
@@ -342,11 +342,9 @@ static void FFLCommon(FPDF_FORMHANDLE hHandle,
 
   FX_RECT clip(start_x, start_y, start_x + size_x, start_y + size_y);
 
+  std::unique_ptr<CFX_FxgeDevice> pDevice(new CFX_FxgeDevice);
 #ifdef _SKIA_SUPPORT_
-  std::unique_ptr<CFX_SkiaDevice> pDevice(new CFX_SkiaDevice());
   pDevice->AttachRecorder(static_cast<SkPictureRecorder*>(recorder));
-#else
-  std::unique_ptr<CFX_FxgeDevice> pDevice(new CFX_FxgeDevice);
 #endif
   pDevice->Attach((CFX_DIBitmap*)bitmap);
   pDevice->SaveState();