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

src/core/SkRecorder.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkRecorder_DEFINED
 #define SkRecorder_DEFINED
 
@@ skipping 114 matching lines @@
     void onDrawBitmapLattice(const SkBitmap&, const Lattice& lattice, const SkRect& dst,
                              const SkPaint*) override;
     void onDrawVertices(VertexMode vmode, int vertexCount,
                         const SkPoint vertices[], const SkPoint texs[],
                         const SkColor colors[], SkXfermode* xmode,
                         const uint16_t indices[], int indexCount,
                         const SkPaint&) override;
     void onDrawAtlas(const SkImage*, const SkRSXform[], const SkRect[], const SkColor[],
                      int count, SkXfermode::Mode, const SkRect* cull, const SkPaint*) override;
 
-    void onClipRect(const SkRect& rect, SkRegion::Op op, ClipEdgeStyle edgeStyle) override;
-    void onClipRRect(const SkRRect& rrect, SkRegion::Op op, ClipEdgeStyle edgeStyle) override;
-    void onClipPath(const SkPath& path, SkRegion::Op op, ClipEdgeStyle edgeStyle) override;
-    void onClipRegion(const SkRegion& deviceRgn, SkRegion::Op op) override;
+    void onClipRect(const SkRect& rect, ClipOp, ClipEdgeStyle) override;
+    void onClipRRect(const SkRRect& rrect, ClipOp, ClipEdgeStyle) override;
+    void onClipPath(const SkPath& path, ClipOp, ClipEdgeStyle) override;
+    void onClipRegion(const SkRegion& deviceRgn, ClipOp) override;
 
     void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) override;
 
 #ifdef SK_EXPERIMENTAL_SHADOWING
     void onDrawShadowedPicture(const SkPicture*,
                                const SkMatrix*,
                                const SkPaint*,
                                const SkShadowParams& params) override;
 #else
     void onDrawShadowedPicture(const SkPicture*,
@@ skipping 23 matching lines @@
 
     DrawPictureMode fDrawPictureMode;
     size_t fApproxBytesUsedBySubPictures;
     SkRecord* fRecord;
     SkAutoTDelete<SkDrawableList> fDrawableList;
 
     SkMiniRecorder* fMiniRecorder;
 };
 
 #endif//SkRecorder_DEFINED