[SPInvaldation] Update subtree paint properties when a layout subtree is inserted

third_party/WebKit/Source/core/paint/FindPropertiesNeedingUpdate.h

 // Copyright 2016 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 FindPropertiesNeedingUpdate_h
 #define FindPropertiesNeedingUpdate_h
 
 #if DCHECK_IS_ON()
 namespace blink {
 
@@ skipping 98 matching lines @@
       const LayoutObject& object,
       PaintPropertyTreeBuilderContext& context)
       : m_object(object),
         m_neededPaintPropertyUpdate(object.needsPaintPropertyUpdate()),
         m_neededForcedSubtreeUpdate(context.forceSubtreeUpdate) {
     // No need to check if an update was already needed.
     if (m_neededPaintPropertyUpdate || m_neededForcedSubtreeUpdate)
       return;
 
     // Mark the properties as needing an update to ensure they are rebuilt.
-    const_cast<LayoutObject&>(m_object)
+    m_object.getMutableForPainting()
         .setOnlyThisNeedsPaintPropertyUpdateForTesting();
 
     if (const auto* properties = m_object.paintProperties())
       m_originalProperties = properties->clone();
   }
 
   ~FindObjectPropertiesNeedingUpdateScope() {
     // No need to check if an update was already needed.
     if (m_neededPaintPropertyUpdate || m_neededForcedSubtreeUpdate)
       return;
@@ skipping 56 matching lines @@
         DCHECK_OBJECT_PROPERTY_EQ(m_object,
                                   originalBorderBox->propertyTreeState.scroll(),
                                   objectBorderBox->propertyTreeState.scroll());
       } else {
         DCHECK_EQ(!!originalBorderBox, !!objectBorderBox);
       }
     } else {
       DCHECK_EQ(!!m_originalProperties, !!objectProperties);
     }
     // Restore original clean bit.
-    const_cast<LayoutObject&>(m_object).clearNeedsPaintPropertyUpdate();
+    m_object.getMutableForPainting().clearNeedsPaintPropertyUpdateForTesting();
   }
 
  private:
   const LayoutObject& m_object;
   bool m_neededPaintPropertyUpdate;
   bool m_neededForcedSubtreeUpdate;
   std::unique_ptr<const ObjectPaintProperties> m_originalProperties;
 };
 
 }  // namespace blink
 #endif  // DCHECK_IS_ON()
 
 #endif  // FindPropertiesNeedingUpdate_h