abstract name of clipping ops, to transtion to a more restricted set

gm/skbug1719.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 #include "SkBlurMaskFilter.h"
 #include "SkColorFilter.h"
@@ skipping 47 matching lines @@
         drawPath.setFillType(SkPath::kEvenOdd_FillType);
 
         SkPaint paint;
         paint.setAntiAlias(true);
         paint.setColor(0xFF000000);
         paint.setMaskFilter(
             SkBlurMaskFilter::Make(kNormal_SkBlurStyle, 0.78867501f,
                                    SkBlurMaskFilter::kHighQuality_BlurFlag));
         paint.setColorFilter(SkColorFilter::MakeModeFilter(0xBFFFFFFF, SkXfermode::kSrcIn_Mode));
 
-        canvas->clipPath(clipPath, SkRegion::kIntersect_Op, true);
+        canvas->clipPath(clipPath, SkCanvas::kIntersect_Op, true);
         canvas->drawPath(drawPath, paint);
 }