add Method param to drawTextOnPath, supporting SVG spec

src/utils/SkNWayCanvas.cpp

Index: src/utils/SkNWayCanvas.cpp
diff --git a/src/utils/SkNWayCanvas.cpp b/src/utils/SkNWayCanvas.cpp
index 14ad6d6f81ef274182baa34bebaa540b216f79ab..53034a984754b9e778c6a863b98c6b4189a7b414 100644
--- a/src/utils/SkNWayCanvas.cpp
+++ b/src/utils/SkNWayCanvas.cpp
@@ -257,10 +257,12 @@ void SkNWayCanvas::onDrawPosTextH(const void* text, size_t byteLength, const SkS
 }
 
 void SkNWayCanvas::onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path,
-                                    const SkMatrix* matrix, const SkPaint& paint) {
+                                    const SkMatrix* matrix,
+                                    SK_SUPPORT_LEGACY_DRAWTEXTONPATH_PARAM const SkPaint& paint) {
     Iter iter(fList);
     while (iter.next()) {
-        iter->drawTextOnPath(text, byteLength, path, matrix, paint);
+        iter->drawTextOnPath(text, byteLength, path, matrix,
+                             SK_SUPPORT_LEGACY_DRAWTEXTONPATH_ARG paint);
     }
 }