Fix paint property under-invalidation checking about reference filters

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 122 matching lines @@
     //    LayoutObject::setNeedsPaintPropertyUpdate().
     // 2) The PrePaintTreeWalk should have had a forced subtree update (see:
     //    PaintPropertyTreeBuilderContext::forceSubtreeupdate).
     const auto* objectProperties = m_object.paintProperties();
     if (m_originalProperties && objectProperties) {
       DCHECK_OBJECT_PROPERTY_EQ(m_object,
                                 m_originalProperties->paintOffsetTranslation(),
                                 objectProperties->paintOffsetTranslation());
       DCHECK_OBJECT_PROPERTY_EQ(m_object, m_originalProperties->transform(),
                                 objectProperties->transform());
+      // This check ignores changes of reference filters.
       DCHECK_OBJECT_PROPERTY_EQ(m_object, m_originalProperties->effect(),
                                 objectProperties->effect());
+      // This remedies the above ignored check of reference filters.
+      DCHECK(m_originalProperties->styleFilterOperations() ==
+             objectProperties->styleFilterOperations())
+          << "Filter operations were updated without the layout object ("
+          << m_object.debugName() << ") needing a paint property update.";
       DCHECK_OBJECT_PROPERTY_EQ(m_object, m_originalProperties->cssClip(),
                                 objectProperties->cssClip());
       DCHECK_OBJECT_PROPERTY_EQ(m_object,
                                 m_originalProperties->cssClipFixedPosition(),
                                 objectProperties->cssClipFixedPosition());
       DCHECK_OBJECT_PROPERTY_EQ(m_object,
                                 m_originalProperties->innerBorderRadiusClip(),
                                 objectProperties->innerBorderRadiusClip());
       DCHECK_OBJECT_PROPERTY_EQ(m_object, m_originalProperties->overflowClip(),
                                 objectProperties->overflowClip());
@@ skipping 45 matching lines @@
   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