Set needs paint property update for changes of SVG isolation and blending.

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 169 matching lines @@
         DCHECK_OBJECT_PROPERTY_EQ(m_object,
                                   originalBorderBox->propertyTreeState.clip(),
                                   objectBorderBox->propertyTreeState.clip());
         DCHECK_OBJECT_PROPERTY_EQ(m_object,
                                   originalBorderBox->propertyTreeState.effect(),
                                   objectBorderBox->propertyTreeState.effect());
         DCHECK_OBJECT_PROPERTY_EQ(m_object,
                                   originalBorderBox->propertyTreeState.scroll(),
                                   objectBorderBox->propertyTreeState.scroll());
       } else {
-        DCHECK_EQ(!!originalBorderBox, !!objectBorderBox);
+        DCHECK_EQ(!!originalBorderBox, !!objectBorderBox)
+            << " Object: " << m_object.debugName();
       }
     } else {
-      DCHECK_EQ(!!m_originalProperties, !!objectProperties);
+      DCHECK_EQ(!!m_originalProperties, !!objectProperties)
+          << " Object: " << m_object.debugName();
     }
     // Restore original clean bit.
     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