| Index: Source/core/dom/Element.cpp
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| diff --git a/Source/core/dom/Element.cpp b/Source/core/dom/Element.cpp
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| index a6401bfae79fb638557f63a0377bb6af3d7a3e96..b816cd65bc6232bfb194b7d2a78692c5c448b2a5 100644
 | 
| --- a/Source/core/dom/Element.cpp
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| +++ b/Source/core/dom/Element.cpp
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| @@ -2854,6 +2854,8 @@ void Element::willModifyAttribute(const QualifiedName& name, const AtomicString&
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|      if (OwnPtrWillBeRawPtr<MutationObserverInterestGroup> recipients = MutationObserverInterestGroup::createForAttributesMutation(*this, name))
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|          recipients->enqueueMutationRecord(MutationRecord::createAttributes(this, name, oldValue));
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|  
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| +    attributeWillChange(name, oldValue, newValue);
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| +
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|      InspectorInstrumentation::willModifyDOMAttr(this, oldValue, newValue);
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|  }
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|  
 | 
| 
 |