Remove ClipPathDisplayItem::clip_op_

cc/blink/web_display_item_list_impl.cc

Index: cc/blink/web_display_item_list_impl.cc
diff --git a/cc/blink/web_display_item_list_impl.cc b/cc/blink/web_display_item_list_impl.cc
index b94d1464349b4bc0e14470a4170e15b557d56d8f..defa0ba64ac7b8a00e6843cf257ff8bb46bd2298 100644
--- a/cc/blink/web_display_item_list_impl.cc
+++ b/cc/blink/web_display_item_list_impl.cc
@@ -71,10 +71,9 @@ void WebDisplayItemListImpl::appendEndClipItem() {
 }
 
 void WebDisplayItemListImpl::appendClipPathItem(const SkPath& clip_path,
-                                                SkClipOp clip_op,
                                                 bool antialias) {
   display_item_list_->CreateAndAppendPairedBeginItem<cc::ClipPathDisplayItem>(
-      clip_path, clip_op, antialias);
+      clip_path, antialias);
 }
 
 void WebDisplayItemListImpl::appendEndClipPathItem() {