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

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

 // 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 "platform/graphics/paint/ScrollDisplayItem.h"
 
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/transforms/AffineTransform.h"
 #include "public/platform/WebDisplayItemList.h"
 
 namespace blink {
 
 void BeginScrollDisplayItem::Replay(GraphicsContext& context) const {
   context.Save();
   context.Translate(-current_offset_.Width(), -current_offset_.Height());
 }
 
 void BeginScrollDisplayItem::AppendToWebDisplayItemList(
-    const IntRect& visual_rect,
+    const LayoutSize&,
     WebDisplayItemList* list) const {
   WebDisplayItemList::ScrollContainerId scroll_container_id = &Client();
   list->AppendScrollItem(current_offset_, scroll_container_id);
 }
 
 #ifndef NDEBUG
 void BeginScrollDisplayItem::DumpPropertiesAsDebugString(
     WTF::StringBuilder& string_builder) const {
   PairedBeginDisplayItem::DumpPropertiesAsDebugString(string_builder);
   string_builder.Append(WTF::String::Format(", currentOffset: [%d,%d]",
                                             current_offset_.Width(),
                                             current_offset_.Height()));
 }
 #endif
 
 void EndScrollDisplayItem::Replay(GraphicsContext& context) const {
   context.Restore();
 }
 
 void EndScrollDisplayItem::AppendToWebDisplayItemList(
-    const IntRect& visual_rect,
+    const LayoutSize&,
     WebDisplayItemList* list) const {
   list->AppendEndScrollItem();
 }
 
 }  // namespace blink