Add drawRegion() API to SkCanvas

src/core/SkRecorder.cpp

Index: src/core/SkRecorder.cpp
diff --git a/src/core/SkRecorder.cpp b/src/core/SkRecorder.cpp
index caa9bb58c32acfd7590abe2b7cddc92869e48806..d7eb7dafbe5c46c2e8cdf6139a1683361e662331 100644
--- a/src/core/SkRecorder.cpp
+++ b/src/core/SkRecorder.cpp
@@ -145,6 +145,10 @@ void SkRecorder::onDrawRect(const SkRect& rect, const SkPaint& paint) {
     APPEND(DrawRect, paint, rect);
 }
 
+void SkRecorder::onDrawRegion(const SkRegion& region, const SkPaint& paint) {
+    APPEND(DrawRegion, paint, region);
+}
+
 void SkRecorder::onDrawOval(const SkRect& oval, const SkPaint& paint) {
     APPEND(DrawOval, paint, oval);
 }