allow clip calls w/o op param, remove unnecessary kReplace ops

gm/rrects.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 #if SK_SUPPORT_GPU
 #include "GrContext.h"
@@ skipping 106 matching lines @@
                             SkAutoTUnref<GrDrawBatch> batch(
                                     GrRectBatchFactory::CreateNonAAFill(0xff000000, SkMatrix::I(),
                                                                         bounds, nullptr, nullptr));
                             drawContext->drawContextPriv().testingOnly_drawBatch(grPaint, batch);
                         } else {
                             drew = false;
                         }
 #endif
                     } else if (kBW_Clip_Type == fType || kAA_Clip_Type == fType) {
                         bool aaClip = (kAA_Clip_Type == fType);
-                        canvas->clipRRect(fRRects[curRRect], SkCanvas::kReplace_Op, aaClip);
+                        canvas->clipRRect(fRRects[curRRect], aaClip);
                         canvas->drawRect(kMaxTileBound, paint);
                     } else {
                         canvas->drawRRect(fRRects[curRRect], paint);
                     }
                 canvas->restore();
                 if (drew) {
                     x = x + kTileX;
                     if (x > kImageWidth) {
                         x = 1;
                         y += kTileY;
@@ skipping 113 matching lines @@
 
 DEF_GM( return new RRectGM(RRectGM::kAA_Draw_Type); )
 DEF_GM( return new RRectGM(RRectGM::kBW_Draw_Type); )
 DEF_GM( return new RRectGM(RRectGM::kAA_Clip_Type); )
 DEF_GM( return new RRectGM(RRectGM::kBW_Clip_Type); )
 #if SK_SUPPORT_GPU
 DEF_GM( return new RRectGM(RRectGM::kEffect_Type); )
 #endif
 
 }