CSSStyleDeclaration::setProperty should override important style

Source/core/editing/EditingStyle.cpp

 /*
  * Copyright (C) 2007, 2008, 2009 Apple Computer, Inc.
  * Copyright (C) 2010, 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 1155 matching lines @@
     RefPtrWillBeRawPtr<MutableStylePropertySet> fromComputedStyle = MutableStylePropertySet::create();
     {
         unsigned propertyCount = m_mutableStyle->propertyCount();
         for (unsigned i = 0; i < propertyCount; ++i) {
             StylePropertySet::PropertyReference property = m_mutableStyle->propertyAt(i);
             CSSValue* value = property.value();
             if (!value->isPrimitiveValue())
                 continue;
             if (toCSSPrimitiveValue(value)->isPercentage()) {
                 if (RefPtrWillBeRawPtr<CSSValue> computedPropertyValue = computedStyleForElement->getPropertyCSSValue(property.id()))
-                    fromComputedStyle->addParsedProperty(CSSProperty(property.id(), computedPropertyValue));
+                    fromComputedStyle->addRespectingCascade(CSSProperty(property.id(), computedPropertyValue));
             }
         }
     }
     m_mutableStyle->mergeAndOverrideOnConflict(fromComputedStyle.get());
 }
 
 static void removePropertiesInStyle(MutableStylePropertySet* styleToRemovePropertiesFrom, StylePropertySet* style)
 {
     unsigned propertyCount = style->propertyCount();
     Vector<CSSPropertyID> propertiesToRemove(propertyCount);
@@ skipping 492 matching lines @@
 {
     for (Node* ancestor = node; ancestor; ancestor = ancestor->parentNode()) {
         RefPtrWillBeRawPtr<CSSComputedStyleDeclaration> ancestorStyle = CSSComputedStyleDeclaration::create(ancestor);
         if (!hasTransparentBackgroundColor(ancestorStyle.get()))
             return ancestorStyle->getPropertyCSSValue(CSSPropertyBackgroundColor);
     }
     return nullptr;
 }
 
 }