Don't access DisplayItemClient::VisualRect() for cached display items.

third_party/WebKit/Source/platform/graphics/paint/PaintArtifact.h

 // Copyright 2015 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.
 
 #ifndef PaintArtifact_h
 #define PaintArtifact_h
 
 #include "platform/PlatformExport.h"
 #include "platform/graphics/paint/DisplayItemList.h"
 #include "platform/graphics/paint/PaintCanvas.h"
@@ skipping 66 matching lines @@
   // Draws the paint artifact to a PaintCanvas.
   // |bounds| is the bounding box of the paint artifact's display list.
   // SPv2 only.
   // In SPv2 mode, replays into the ancestor state given by |replayState|.
   void Replay(
       const FloatRect& bounds,
       PaintCanvas&,
       const PropertyTreeState& replay_state = PropertyTreeState::Root()) const;
 
   // Writes the paint artifact into a WebDisplayItemList.
-  void AppendToWebDisplayItemList(WebDisplayItemList*) const;
+  void AppendToWebDisplayItemList(const LayoutSize& visual_rect_offset,
+                                  WebDisplayItemList*) const;
 
  private:
   DisplayItemList display_item_list_;
   Vector<PaintChunk> paint_chunks_;
   bool is_suitable_for_gpu_rasterization_;
 };
 
 }  // namespace blink
 
 #endif  // PaintArtifact_h