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/SkProxyCanvas.cpp b/src/utils/SkProxyCanvas.cpp
index f530313..245e0a6 100644
--- a/src/utils/SkProxyCanvas.cpp
+++ b/src/utils/SkProxyCanvas.cpp
@@ -95,6 +95,11 @@
     fProxy->drawRRect(rrect, paint);
 }
 
+void SkProxyCanvas::onDrawDRRect(const SkRRect& outer, const SkRRect& inner,
+                                 const SkPaint& paint) {
+    fProxy->drawDRRect(outer, inner, paint);
+}
+
 void SkProxyCanvas::drawPath(const SkPath& path, const SkPaint& paint) {
     fProxy->drawPath(path, paint);
 }