Add tileSKP option to nanobench

bench/SKPBench.h

Index: bench/SKPBench.h
diff --git a/bench/SKPBench.h b/bench/SKPBench.h
index 1f34a003b283c4a26fc54c4cae3b983ec702f207..3ffe6bbbe8931eaf34f2cef8cd133a6f7578c3d3 100644
--- a/bench/SKPBench.h
+++ b/bench/SKPBench.h
@@ -39,10 +39,12 @@ protected:
     void onDraw(int loops, SkCanvas* canvas) override;
     SkIPoint onGetSize() override;
 
+    virtual void drawPicture(SkCanvas*);
     virtual void drawMPDPicture();
-    virtual void drawPicture();
+    virtual void drawPictureTiled();
 
     const SkPicture* picture() const { return fPic; }
+    SkScalar scale() const { return fScale; }
     const SkTDArray<SkSurface*>& surfaces() const { return fSurfaces; }
     const SkTDArray<SkIRect>& tileRects() const { return fTileRects; }