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

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

 // 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.
 
 #include "platform/graphics/paint/PaintArtifact.h"
 
 #include "cc/paint/display_item_list.h"
 #include "platform/geometry/IntRect.h"
 #include "platform/graphics/GraphicsLayer.h"
 #include "platform/graphics/compositing/PaintChunksToCcLayer.h"
@@ skipping 99 matching lines @@
   // references into pointers.
   for (const auto& chunk : PaintChunks())
     pointer_paint_chunks.push_back(&chunk);
   scoped_refptr<cc::DisplayItemList> display_item_list =
       PaintChunksToCcLayer::Convert(pointer_paint_chunks, replay_state,
                                     gfx::Vector2dF(), GetDisplayItemList());
   canvas.drawDisplayItemList(display_item_list);
 }
 
 DISABLE_CFI_PERF
-void PaintArtifact::AppendToWebDisplayItemList(WebDisplayItemList* list) const {
+void PaintArtifact::AppendToWebDisplayItemList(
+    const LayoutSize& visual_rect_offset,
+    WebDisplayItemList* list) const {
   TRACE_EVENT0("blink,benchmark", "PaintArtifact::appendToWebDisplayItemList");
-  size_t visual_rect_index = 0;
-  for (const DisplayItem& display_item : display_item_list_) {
-    display_item.AppendToWebDisplayItemList(
-        display_item_list_.VisualRect(visual_rect_index), list);
-    visual_rect_index++;
-  }
+  for (const DisplayItem& item : display_item_list_)
+    item.AppendToWebDisplayItemList(visual_rect_offset, list);
   list->SetIsSuitableForGpuRasterization(IsSuitableForGpuRasterization());
 }
 
 }  // namespace blink