override new virtual onDrawDRRect in util canvas subclasses

BUG=skia:
R=robertphillips@google.com, reed@google.com

Author: reed@chromium.org

Review URL: https://codereview.chromium.org/174593003

git-svn-id: http://skia.googlecode.com/svn/trunk@13529 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/utils/SkNWayCanvas.cpp b/src/utils/SkNWayCanvas.cpp
index 831d7bf..27adc6d 100644
--- a/src/utils/SkNWayCanvas.cpp
+++ b/src/utils/SkNWayCanvas.cpp
@@ -205,6 +205,14 @@
     }
 }
 
+void SkNWayCanvas::onDrawDRRect(const SkRRect& outer, const SkRRect& inner,
+                                const SkPaint& paint) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->drawDRRect(outer, inner, paint);
+    }
+}
+
 void SkNWayCanvas::drawPath(const SkPath& path, const SkPaint& paint) {
     Iter iter(fList);
     while (iter.next()) {