stop using exotic clipops

cc/playback/display_item_list_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/playback/display_item_list.h"
 
 #include <stddef.h>
 
 #include <vector>
 
@@ skipping 183 matching lines @@
   scoped_refptr<DisplayItemList> list = DisplayItemList::Create(settings);
   list->SetRetainVisualRectsForTesting(true);
 
   // Build the DrawingDisplayItem.
   AppendFirstSerializationTestPicture(list, layer_size);
 
   // Build the ClipPathDisplayItem.
   SkPath path;
   path.addCircle(5.f, 5.f, 2.f, SkPath::Direction::kCW_Direction);
   list->CreateAndAppendPairedBeginItem<ClipPathDisplayItem>(
-      path, SkClipOp::kReplace, false);
+      path, SkClipOp::kIntersect, false);
 
   // Build the second DrawingDisplayItem.
   AppendSecondSerializationTestPicture(list, layer_size);
 
   // Build the EndClipPathDisplayItem.
   list->CreateAndAppendPairedEndItem<EndClipPathDisplayItem>();
 
   ValidateDisplayItemListSerialization(layer_size, list);
 }
 
@@ skipping 729 matching lines @@
   list->CreateAndAppendPairedEndItem<EndClipDisplayItem>();
 
   EXPECT_EQ(4u, list->size());
   EXPECT_RECT_EQ(filter_bounds, list->VisualRectForTesting(0));
   EXPECT_RECT_EQ(filter_bounds, list->VisualRectForTesting(1));
   EXPECT_RECT_EQ(filter_bounds, list->VisualRectForTesting(2));
   EXPECT_RECT_EQ(filter_bounds, list->VisualRectForTesting(3));
 }
 
 }  // namespace cc