add SkCanvas::drawDRRect

src/core/SkBBoxRecord.cpp

Index: src/core/SkBBoxRecord.cpp
diff --git a/src/core/SkBBoxRecord.cpp b/src/core/SkBBoxRecord.cpp
index a757a245ce1ce6000fd9abb367fbe77e5f1c4d25..7075cd165129294e166ff867f67ca26b840c8984 100644
--- a/src/core/SkBBoxRecord.cpp
+++ b/src/core/SkBBoxRecord.cpp
@@ -26,6 +26,13 @@ void SkBBoxRecord::drawRect(const SkRect& rect, const SkPaint& paint) {
     }
 }
 
+void SkBBoxRecord::onDrawDRRect(const SkRRect& outer, const SkRRect& inner,
+                                const SkPaint& paint) {
+    if (this->transformBounds(outer.rect(), &paint)) {
+        this->INHERITED::onDrawDRRect(outer, inner, paint);
+    }
+}
+
 void SkBBoxRecord::drawPath(const SkPath& path, const SkPaint& paint) {
     if (path.isInverseFillType()) {
         // If path is inverse filled, use the current clip bounds as the