make drawImage a virtual on SkDevice

src/image/SkImage_Raster.cpp

Index: src/image/SkImage_Raster.cpp
diff --git a/src/image/SkImage_Raster.cpp b/src/image/SkImage_Raster.cpp
index acf805829d5d97579d97eb35e27976635fd711d4..20ae62c9f75ff191db6620e3b3cdf212f9c6129b 100644
--- a/src/image/SkImage_Raster.cpp
+++ b/src/image/SkImage_Raster.cpp
@@ -53,8 +53,6 @@ public:
     SkImage_Raster(const SkImageInfo&, SkData*, size_t rb, const SkSurfaceProps*);
     virtual ~SkImage_Raster();
 
-    void onDraw(SkCanvas*, SkScalar, SkScalar, const SkPaint*) const override;
-    void onDrawRect(SkCanvas*, const SkRect*, const SkRect&, const SkPaint*) const override;
     SkSurface* onNewSurface(const SkImageInfo&, const SkSurfaceProps&) const override;
     bool onReadPixels(const SkImageInfo&, void*, size_t, int srcX, int srcY) const override;
     const void* onPeekPixels(SkImageInfo*, size_t* /*rowBytes*/) const override;
@@ -120,17 +118,6 @@ SkShader* SkImage_Raster::onNewShader(SkShader::TileMode tileX, SkShader::TileMo
     return SkShader::CreateBitmapShader(fBitmap, tileX, tileY, localMatrix);
 }
 
-void SkImage_Raster::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkPaint* paint) const {
-    SkBitmap shallowCopy(fBitmap);
-    canvas->drawBitmap(shallowCopy, x, y, paint);
-}
-
-void SkImage_Raster::onDrawRect(SkCanvas* canvas, const SkRect* src, const SkRect& dst,
-                                      const SkPaint* paint) const {
-    SkBitmap shallowCopy(fBitmap);
-    canvas->drawBitmapRectToRect(shallowCopy, src, dst, paint);
-}
-
 SkSurface* SkImage_Raster::onNewSurface(const SkImageInfo& info, const SkSurfaceProps& props) const {
     return SkSurface::NewRaster(info, &props);
 }