Fix assertion failure during out-of-order matching

Source/platform/graphics/paint/DisplayItemList.h

Index: Source/platform/graphics/paint/DisplayItemList.h
diff --git a/Source/platform/graphics/paint/DisplayItemList.h b/Source/platform/graphics/paint/DisplayItemList.h
index 84ef3f1a839b38836158bd9ce364569e41e14ad5..6f6e14a23fc93df1a581288c8e5c066a0dca3c27 100644
--- a/Source/platform/graphics/paint/DisplayItemList.h
+++ b/Source/platform/graphics/paint/DisplayItemList.h
@@ -179,8 +179,8 @@ private:
     static void addItemToIndexIfNeeded(const DisplayItem&, size_t index, DisplayItemIndicesByClientMap&);
 
     struct OutOfOrderIndexContext;
-    DisplayItems::iterator findOutOfOrderCachedItem(DisplayItems::iterator currentIt, const DisplayItem::Id&, OutOfOrderIndexContext&);
-    DisplayItems::iterator findOutOfOrderCachedItemForward(DisplayItems::iterator currentIt, const DisplayItem::Id&, OutOfOrderIndexContext&);
+    DisplayItems::iterator findOutOfOrderCachedItem(const DisplayItem::Id&, OutOfOrderIndexContext&);
+    DisplayItems::iterator findOutOfOrderCachedItemForward(const DisplayItem::Id&, OutOfOrderIndexContext&);
     void copyCachedSubsequence(DisplayItems::iterator& currentIt, DisplayItems& updatedList);
 
 #if ENABLE(ASSERT)