Alter SkCanvas::drawPicture (devirtualize, take const SkPicture, take pointer)

src/utils/SkNWayCanvas.cpp

Index: src/utils/SkNWayCanvas.cpp
diff --git a/src/utils/SkNWayCanvas.cpp b/src/utils/SkNWayCanvas.cpp
index 3c98e4be09b0c87a5ad49bb39b175e0ed5cc33e0..505c05cbf16dad0b0e52c5a9460663271546a666 100644
--- a/src/utils/SkNWayCanvas.cpp
+++ b/src/utils/SkNWayCanvas.cpp
@@ -265,7 +265,7 @@ void SkNWayCanvas::onDrawTextOnPath(const void* text, size_t byteLength, const S
     }
 }
 
-void SkNWayCanvas::drawPicture(SkPicture& picture) {
+void SkNWayCanvas::onDrawPicture(const SkPicture* picture) {
     Iter iter(fList);
     while (iter.next()) {
         iter->drawPicture(picture);