Fix paint property under-invalidation checking about reference filters

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

Index: third_party/WebKit/Source/core/paint/FindPropertiesNeedingUpdate.h
diff --git a/third_party/WebKit/Source/core/paint/FindPropertiesNeedingUpdate.h b/third_party/WebKit/Source/core/paint/FindPropertiesNeedingUpdate.h
index cf648c6e1b1cbbb9122a5663557fab281c0cd463..e444b3f47449735ceef60ff52fb19bc024e9d978 100644
--- a/third_party/WebKit/Source/core/paint/FindPropertiesNeedingUpdate.h
+++ b/third_party/WebKit/Source/core/paint/FindPropertiesNeedingUpdate.h
@@ -140,8 +140,14 @@ class FindObjectPropertiesNeedingUpdateScope {
                                 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,