fix non-square stroke rects (non-aa)

gm/strokerect.cpp

Index: gm/strokerect.cpp
diff --git a/gm/strokerect.cpp b/gm/strokerect.cpp
index f7e36057dff838a91a05f4c288d36d1267da0260..a1c8bb8d9ad07372a03cda7dc9812240e3199180 100644
--- a/gm/strokerect.cpp
+++ b/gm/strokerect.cpp
@@ -110,7 +110,20 @@ protected:
 private:
     typedef GM INHERITED;
 };
+DEF_GM(return new StrokeRectGM;)
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
-DEF_GM(return new StrokeRectGM;)
+/*
+ *  Exercise rect-stroking (which is specialized from paths) when the resulting stroke-width is
+ *  non-square. See https://bugs.chromium.org/p/skia/issues/detail?id=5408
+ */
+DEF_SIMPLE_GM(strokerect_anisotropic_5408, canvas, 200, 50) {
+    SkPaint p;
+    p.setStyle(SkPaint::kStroke_Style);
+    p.setStrokeWidth(6);
+
+    canvas->scale(10, 1);
+    SkRect r = SkRect::MakeXYWH(5, 20, 10, 10);
+    canvas->drawRect(r, p);
+}