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

src/pdf/SkPDFCanvas.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkLatticeIter.h"
 #include "SkPDFCanvas.h"
 #include "SkPDFDevice.h"
 
 SkPDFCanvas::SkPDFCanvas(const sk_sp<SkPDFDevice>& dev)
     : SkCanvas(dev.get()) {}
 
 SkPDFCanvas::~SkPDFCanvas() {}
 
 /*
  *  PDF's impl sometimes wants to access the raster clip as a SkRegion. To keep this valid,
  *  we intercept all clip calls to ensure that the clip stays BW (i.e. never antialiased), since
  *  an antialiased clip won't build a SkRegion (it builds SkAAClip).
  */
-void SkPDFCanvas::onClipRect(const SkRect& rect, SkRegion::Op op, ClipEdgeStyle edgeStyle) {
+void SkPDFCanvas::onClipRect(const SkRect& rect, ClipOp op, ClipEdgeStyle edgeStyle) {
     this->INHERITED::onClipRect(rect, op, kHard_ClipEdgeStyle);
 }
 
-void SkPDFCanvas::onClipRRect(const SkRRect& rrect, SkRegion::Op op, ClipEdgeStyle edgeStyle) {
+void SkPDFCanvas::onClipRRect(const SkRRect& rrect, ClipOp op, ClipEdgeStyle edgeStyle) {
     this->INHERITED::onClipRRect(rrect, op, kHard_ClipEdgeStyle);
 }
 
-void SkPDFCanvas::onClipPath(const SkPath& path, SkRegion::Op op, ClipEdgeStyle edgeStyle) {
+void SkPDFCanvas::onClipPath(const SkPath& path, ClipOp op, ClipEdgeStyle edgeStyle) {
     this->INHERITED::onClipPath(path, op, kHard_ClipEdgeStyle);
 }
 
 void SkPDFCanvas::onDrawBitmapNine(const SkBitmap& bitmap,
                                    const SkIRect& center,
                                    const SkRect& dst,
                                    const SkPaint* paint) {
     SkLatticeIter iter(bitmap.width(), bitmap.height(), center, dst);
     SkRect srcR, dstR;
     while (iter.next(&srcR, &dstR)) {
@@ skipping 59 matching lines @@
                                       const Lattice& lattice,
                                       const SkRect& dst,
                                       const SkPaint* paint) {
     SkLatticeIter iter(bitmap.width(), bitmap.height(), lattice, dst);
     SkRect srcR, dstR;
     while (iter.next(&srcR, &dstR)) {
         this->drawBitmapRect(bitmap, srcR, dstR, paint);
     }
 }