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

samplecode/SampleLayers.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SampleCode.h"
 #include "SkView.h"
 #include "SkCanvas.h"
@@ skipping 237 matching lines @@
 
         const SkScalar w = 250;
         const SkScalar h = 150;
         SkPath path;
         path.addOval(SkRect::MakeXYWH(-w/2, -h/2, w, h));
         SkMatrix m;
         m.setRotate(fAngle);
         m.postTranslate(fCenter.x(), fCenter.y());
         path.transform(m);
 
-        canvas->clipPath(path, SkRegion::kIntersect_Op, true);
+        canvas->clipPath(path, SkCanvas::kIntersect_Op, true);
         const SkRect bounds = path.getBounds();
 
         SkPaint paint;
         paint.setAlpha(0xCC);
         canvas->saveLayer({ &bounds, &paint, fFilter.get(), 0 });
 
         canvas->restore();
     }
 
     bool onAnimate(const SkAnimTimer& timer) override {
         fAngle = SkDoubleToScalar(fmod(timer.secs() * 360 / 5, 360));
         return true;
     }
 
     SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned modi) override {
         this->inval(nullptr);
         return new Click(this);
     }
 
     bool onClick(Click* click) override {
         this->inval(nullptr);
         fCenter = click->fCurr;
         return this->INHERITED::onClick(click);
     }
 
 private:
     typedef SampleView INHERITED;
 };
 DEF_SAMPLE( return new BackdropView; )