use ClipOp instead of SkRegion for clipping

gm/pathopsinverse.cpp

Index: gm/pathopsinverse.cpp
diff --git a/gm/pathopsinverse.cpp b/gm/pathopsinverse.cpp
index 743db222e7107a0037afeddf826058722f01420e..32a40f9aa7137b1822eff991aadcfa088425c8b2 100644
--- a/gm/pathopsinverse.cpp
+++ b/gm/pathopsinverse.cpp
@@ -75,7 +75,7 @@ protected:
                 two.addRect(40, 40, 100, 100);
                 canvas->save();
                 canvas->translate(0, SkIntToScalar(yPos));
-                canvas->clipRect(SkRect::MakeWH(110, 110), SkRegion::kIntersect_Op, true);
+                canvas->clipRect(SkRect::MakeWH(110, 110), kIntersect_SkClipOp, true);
                 canvas->drawPath(one, fOnePaint);
                 canvas->drawPath(one, fOutlinePaint);
                 canvas->drawPath(two, fTwoPaint);
@@ -87,7 +87,7 @@ protected:
                     Op(one, two, (SkPathOp) op, &result);
                     canvas->save();
                     canvas->translate(SkIntToScalar(xPos), SkIntToScalar(yPos));
-                    canvas->clipRect(SkRect::MakeWH(110, 110), SkRegion::kIntersect_Op, true);
+                    canvas->clipRect(SkRect::MakeWH(110, 110), kIntersect_SkClipOp, true);
                     canvas->drawPath(result, fOpPaint[op]);
                     canvas->drawPath(result, fOutlinePaint);
                     canvas->restore();