Mv DRRect drawing code from GrDrawContext into SkGpuDevice

src/gpu/SkGpuDevice.h

Index: src/gpu/SkGpuDevice.h
diff --git a/src/gpu/SkGpuDevice.h b/src/gpu/SkGpuDevice.h
index ec3e15870620022426c4dc60d11bf93705832ab0..ef3452078c24458b54a0960248f991b90040c323 100644
--- a/src/gpu/SkGpuDevice.h
+++ b/src/gpu/SkGpuDevice.h
@@ -251,6 +251,9 @@ private:
                                  const GrClip&,
                                  const SkPaint&);
 
+    bool drawFilledDRRect(const SkMatrix& viewMatrix, const SkRRect& outer,
+                          const SkRRect& inner, const SkPaint& paint);
+
     void drawProducerNine(const SkDraw&, GrTextureProducer*, const SkIRect& center,
                           const SkRect& dst, const SkPaint&);