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

src/pipe/SkPipeCanvas.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 "SkPathEffect.h"
 #include "SkColorFilter.h"
 #include "SkDrawLooper.h"
@@ skipping 300 matching lines @@
 void SkPipeCanvas::didConcat(const SkMatrix& matrix) {
     do_concat(fStream, matrix, false);
     this->INHERITED::didConcat(matrix);
 }
 
 void SkPipeCanvas::didSetMatrix(const SkMatrix& matrix) {
     do_concat(fStream, matrix, true);
     this->INHERITED::didSetMatrix(matrix);
 }
 
-void SkPipeCanvas::onClipRect(const SkRect& rect, SkRegion::Op op, ClipEdgeStyle edgeStyle) {
+void SkPipeCanvas::onClipRect(const SkRect& rect, ClipOp op, ClipEdgeStyle edgeStyle) {
     fStream->write32(pack_verb(SkPipeVerb::kClipRect, ((unsigned)op << 1) | edgeStyle));
     fStream->write(&rect, 4 * sizeof(SkScalar));
 
     this->INHERITED::onClipRect(rect, op, edgeStyle);
 }
 
-void SkPipeCanvas::onClipRRect(const SkRRect& rrect, SkRegion::Op op, ClipEdgeStyle edgeStyle) {
+void SkPipeCanvas::onClipRRect(const SkRRect& rrect, ClipOp op, ClipEdgeStyle edgeStyle) {
     fStream->write32(pack_verb(SkPipeVerb::kClipRRect, ((unsigned)op << 1) | edgeStyle));
     write_rrect(fStream, rrect);
 
     this->INHERITED::onClipRRect(rrect, op, edgeStyle);
 }
 
-void SkPipeCanvas::onClipPath(const SkPath& path, SkRegion::Op op, ClipEdgeStyle edgeStyle) {
+void SkPipeCanvas::onClipPath(const SkPath& path, ClipOp op, ClipEdgeStyle edgeStyle) {
     SkPipeWriter writer(this);
     writer.write32(pack_verb(SkPipeVerb::kClipPath, ((unsigned)op << 1) | edgeStyle));
     writer.writePath(path);
 
     this->INHERITED::onClipPath(path, op, edgeStyle);
 }
 
-void SkPipeCanvas::onClipRegion(const SkRegion& deviceRgn, SkRegion::Op op) {
+void SkPipeCanvas::onClipRegion(const SkRegion& deviceRgn, ClipOp op) {
     SkPipeWriter writer(this);
     writer.write32(pack_verb(SkPipeVerb::kClipRegion, (unsigned)op << 1));
     writer.writeRegion(deviceRgn);
 
     this->INHERITED::onClipRegion(deviceRgn, op);
 }
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 void SkPipeCanvas::onDrawArc(const SkRect& bounds, SkScalar startAngle, SkScalar sweepAngle,
@@ skipping 713 matching lines @@
     fImpl->fDeduper.setStream(stream);
     fImpl->fDeduper.setCanvas(fImpl->fCanvas.get());
     return fImpl->fCanvas.get();
 }
 
 void SkPipeSerializer::endWrite() {
     fImpl->fCanvas->restoreToCount(1);
     fImpl->fCanvas.reset(nullptr);
     fImpl->fDeduper.setCanvas(nullptr);
 }