Introduce Element::AttributeModificationParams

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010 Apple Inc. All rights
  * reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 230 matching lines @@
   if (intrinsicSizingViewportDependant) {
     if (!m_listener)
       m_listener = ViewportChangeListener::create(this);
 
     document().mediaQueryMatcher().addViewportListener(m_listener);
   } else if (m_listener) {
     document().mediaQueryMatcher().removeViewportListener(m_listener);
   }
 }
 
-void HTMLImageElement::parseAttribute(const QualifiedName& name,
-                                      const AtomicString& oldValue,
-                                      const AtomicString& value) {
+void HTMLImageElement::parseAttribute(
+    const AttributeModificationParams& params) {
+  const QualifiedName& name = params.name;
   if (name == altAttr || name == titleAttr) {
     if (userAgentShadowRoot()) {
       Element* text = userAgentShadowRoot()->getElementById("alttext");
       String value = altText();
-      if (text && text->textContent() != value)
+      if (text && text->textContent() != params.newValue)
         text->setTextContent(altText());
     }
   } else if (name == srcAttr || name == srcsetAttr || name == sizesAttr) {
     selectSourceURL(ImageLoader::UpdateIgnorePreviousError);
   } else if (name == usemapAttr) {
-    setIsLink(!value.isNull());
+    setIsLink(!params.newValue.isNull());
   } else if (name == referrerpolicyAttr) {
     m_referrerPolicy = ReferrerPolicyDefault;
-    if (!value.isNull())
+    if (!params.newValue.isNull()) {
       SecurityPolicy::referrerPolicyFromStringWithLegacyKeywords(
-          value, &m_referrerPolicy);
+          params.newValue, &m_referrerPolicy);
+    }
   } else {
-    HTMLElement::parseAttribute(name, oldValue, value);
+    HTMLElement::parseAttribute(params);
   }
 }
 
 String HTMLImageElement::altText() const {
   // lets figure out the alt text.. magic stuff
   // http://www.w3.org/TR/1998/REC-html40-19980424/appendix/notes.html#altgen
   // also heavily discussed by Hixie on bugzilla
   const AtomicString& alt = fastGetAttribute(altAttr);
   if (!alt.isNull())
     return alt;
@@ skipping 627 matching lines @@
 void HTMLImageElement::associateWith(HTMLFormElement* form) {
   if (form && form->isConnected()) {
     m_form = form;
     m_formWasSetByParser = true;
     m_form->associate(*this);
     m_form->didAssociateByParser();
   }
 };
 
 }  // namespace blink