Override SkCanvas::drawImage() in SkRecorder.

src/image/SkImagePriv.h

Index: src/image/SkImagePriv.h
diff --git a/src/image/SkImagePriv.h b/src/image/SkImagePriv.h
index 89900766b4275900ff13c2c1276b13304090a957..e9d1d838991adfa08b1e565d614bec932645ce89 100644
--- a/src/image/SkImagePriv.h
+++ b/src/image/SkImagePriv.h
@@ -33,7 +33,7 @@ static inline size_t SkImageMinRowBytes(const SkImageInfo& info) {
 // Given an image created from SkNewImageFromBitmap, return its pixelref. This
 // may be called to see if the surface and the image share the same pixelref,
 // in which case the surface may need to perform a copy-on-write.
-extern SkPixelRef* SkBitmapImageGetPixelRef(SkImage* rasterImage);
+extern const SkPixelRef* SkBitmapImageGetPixelRef(const SkImage* rasterImage);
 
 // Given an image created with NewTexture, return its GrTexture. This
 // may be called to see if the surface and the image share the same GrTexture,