use SkBlendMode

skbug.com/5814

Test: compile only
Change-Id: Ibbaff43df1117b2ca77fd8f917f03d88cc476330
(cherry picked from commit 26edbcba8a2ed4cb300e7f87e679e3b73cec2772)
diff --git a/libs/hwui/SkiaCanvasProxy.h b/libs/hwui/SkiaCanvasProxy.h
index 3ee8c6e..0111815 100644
--- a/libs/hwui/SkiaCanvasProxy.h
+++ b/libs/hwui/SkiaCanvasProxy.h
@@ -67,7 +67,7 @@
     virtual void onDrawBitmapNine(const SkBitmap& bitmap, const SkIRect& center,
                                   const SkRect& dst, const SkPaint*) override;
     virtual void onDrawVertices(VertexMode, int vertexCount, const SkPoint vertices[],
-                                const SkPoint texs[], const SkColor colors[], SkXfermode*,
+                                const SkPoint texs[], const SkColor colors[], SkBlendMode,
                                 const uint16_t indices[], int indexCount,
                                 const SkPaint&) override;
 
@@ -87,7 +87,7 @@
                                 const SkPaint& paint) override;
 
     virtual void onDrawPatch(const SkPoint cubics[12], const SkColor colors[4],
-                             const SkPoint texCoords[4], SkXfermode* xmode,
+                             const SkPoint texCoords[4], SkBlendMode,
                              const SkPaint& paint) override;
 
     virtual void onClipRect(const SkRect&, SkRegion::Op, ClipEdgeStyle) override;