Plumb drawArc to SkDevice

src/utils/SkShadowPaintFilterCanvas.h

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkShadowPaintFilterCanvas_DEFINED
 #define SkShadowPaintFilterCanvas_DEFINED
 
@@ skipping 37 matching lines @@
 
     void onDrawRect(const SkRect &rect, const SkPaint &paint) override;
 
     void onDrawRRect(const SkRRect &rrect, const SkPaint &paint) override;
 
     void onDrawDRRect(const SkRRect &outer, const SkRRect &inner,
                       const SkPaint &paint) override;
 
     void onDrawOval(const SkRect &rect, const SkPaint &paint) override;
 
+    void onDrawArc(const SkRect&, SkScalar, SkScalar, bool, const SkPaint&) override;
+
     void onDrawPath(const SkPath &path, const SkPaint &paint) override;
 
     void onDrawBitmap(const SkBitmap &bm, SkScalar left, SkScalar top,
                       const SkPaint *paint) override;
 
     void onDrawBitmapRect(const SkBitmap &bm, const SkRect *src, const SkRect &dst,
                           const SkPaint *paint, SrcRectConstraint constraint) override;
 
     void onDrawBitmapNine(const SkBitmap &bm, const SkIRect &center,
                           const SkRect &dst, const SkPaint *paint) override;
@@ skipping 36 matching lines @@
 
     void onDrawTextBlob(const SkTextBlob *blob, SkScalar x,
                         SkScalar y, const SkPaint &paint) override;
 private:
     typedef SkPaintFilterCanvas INHERITED;
 };
 
 
 #endif
 #endif