Introduce Element::AttributeModificationParams

third_party/WebKit/Source/core/html/HTMLContentElement.cpp

 /*
  * Copyright (C) 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 52 matching lines @@
   DCHECK(m_shouldParseSelect);
 
   m_selectorList = CSSParser::parseSelector(
       CSSParserContext(document(), nullptr), nullptr, m_select);
   m_shouldParseSelect = false;
   m_isValidSelector = validateSelect();
   if (!m_isValidSelector)
     m_selectorList = CSSSelectorList();
 }
 
-void HTMLContentElement::parseAttribute(const QualifiedName& name,
-                                        const AtomicString& oldValue,
-                                        const AtomicString& value) {
-  if (name == selectAttr) {
+void HTMLContentElement::parseAttribute(
+    const AttributeModificationParams& params) {
+  if (params.name == selectAttr) {
     if (ShadowRoot* root = containingShadowRoot()) {
       if (!root->isV1() && root->owner())
         root->owner()->v0().willAffectSelector();
     }
     m_shouldParseSelect = true;
-    m_select = value;
+    m_select = params.newValue;
   } else {
-    InsertionPoint::parseAttribute(name, oldValue, value);
+    InsertionPoint::parseAttribute(params);
   }
 }
 
 static inline bool includesDisallowedPseudoClass(const CSSSelector& selector) {
   if (selector.getPseudoType() == CSSSelector::PseudoNot) {
     const CSSSelector* subSelector = selector.selectorList()->first();
     return subSelector->match() == CSSSelector::PseudoClass;
   }
   return selector.match() == CSSSelector::PseudoClass;
 }
@@ skipping 32 matching lines @@
   for (const CSSSelector* selector = selectorList().first(); selector;
        selector = CSSSelectorList::next(*selector)) {
     context.selector = selector;
     if (checker.match(context))
       return true;
   }
   return false;
 }
 
 }  // namespace blink