Move previous border box size out of global map into LayoutBox::m_previousSize

third_party/WebKit/Source/core/paint/ViewPaintInvalidator.cpp

 // Copyright 2017 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 "core/paint/ViewPaintInvalidator.h"
 
 #include "core/layout/LayoutView.h"
 #include "core/paint/BoxPaintInvalidator.h"
 #include "platform/geometry/LayoutSize.h"
 
@@ skipping 15 matching lines @@
   // document element.
   // See https://drafts.csswg.org/css-backgrounds-3/#root-background.
   Element* documentElement = m_view.document().documentElement();
   if (!documentElement)
     return;
   const LayoutObject* backgroundObject = documentElement->layoutObject();
   if (!backgroundObject || !backgroundObject->isBox())
     return;
 
   const LayoutBox& backgroundBox = toLayoutBox(*backgroundObject);
-  LayoutSize oldSize = BoxPaintInvalidator::previousBorderBoxSize(
-      backgroundBox, backgroundBox.visualRect().size());
+  LayoutSize oldSize = backgroundBox.previousSize();
   LayoutSize newSize = backgroundBox.size();
   const auto& backgroundLayers = m_view.styleRef().backgroundLayers();
   if ((oldSize.width() != newSize.width() &&
        LayoutBox::mustInvalidateFillLayersPaintOnWidthChange(
            backgroundLayers)) ||
       (oldSize.height() != newSize.height() &&
        LayoutBox::mustInvalidateFillLayersPaintOnHeightChange(
            backgroundLayers))) {
     m_view.getMutableForPainting().setShouldDoFullPaintInvalidation(
         PaintInvalidationViewBackground);
   }
 }
 
 }  // namespace blink