use ClipOp instead of SkRegion for clipping

tests/CanvasStateTest.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 "CanvasStateHelpers.h"
 #include "SkCanvas.h"
 #include "SkCanvasStateUtils.h"
@@ skipping 272 matching lines @@
 static void error_callback(SkError code, void* ctx) {}
 
 DEF_TEST(CanvasState_test_soft_clips, reporter) {
     SkBitmap bitmap;
     bitmap.allocN32Pixels(10, 10);
     SkCanvas canvas(bitmap);
 
     SkRRect roundRect;
     roundRect.setOval(SkRect::MakeWH(5, 5));
 
-    canvas.clipRRect(roundRect, SkRegion::kIntersect_Op, true);
+    canvas.clipRRect(roundRect, kIntersect_SkClipOp, true);
 
     SkSetErrorCallback(error_callback, NULL);
 
     SkCanvasState* state = SkCanvasStateUtils::CaptureCanvasState(&canvas);
     REPORTER_ASSERT(reporter, !state);
 
     REPORTER_ASSERT(reporter, kInvalidOperation_SkError == SkGetLastError());
     SkClearLastError();
 }
 
@@ skipping 24 matching lines @@
     // Check that saveLayer with the kClipToLayer_SaveFlag sets the clip
     // stack to the layer bounds.
     canvas.saveLayer(&bounds, NULL, SkCanvas::kARGB_ClipLayer_SaveFlag);
     canvas.getClipStack()->getBounds(&clipStackBounds, &boundsType);
     REPORTER_ASSERT(reporter, clipStackBounds.width() == LAYER_WIDTH);
     REPORTER_ASSERT(reporter, clipStackBounds.height() == LAYER_HEIGHT);
 
     canvas.restore();
 }
 #endif