Introduce Element::AttributeModificationParams

third_party/WebKit/Source/core/svg/SVGSVGElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2014 Google, Inc.
  *
  * 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
  * version 2 of the License, or (at your option) any later version.
@@ skipping 137 matching lines @@
         LayoutInvalidationReason::Unknown);
 }
 
 bool SVGSVGElement::zoomAndPanEnabled() const {
   SVGZoomAndPanType zoomAndPan = this->zoomAndPan();
   if (m_viewSpec)
     zoomAndPan = m_viewSpec->zoomAndPan();
   return zoomAndPan == SVGZoomAndPanMagnify;
 }
 
-void SVGSVGElement::parseAttribute(const QualifiedName& name,
-                                   const AtomicString& oldValue,
-                                   const AtomicString& value) {
+void SVGSVGElement::parseAttribute(const AttributeModificationParams& params) {
+  const QualifiedName& name = params.name;
+  const AtomicString& value = params.newValue;
   if (!nearestViewportElement()) {
     bool setListener = true;
 
     // Only handle events if we're the outermost <svg> element
     if (name == HTMLNames::onunloadAttr) {
       document().setWindowAttributeEventListener(
           EventTypeNames::unload,
           createAttributeEventListener(document().frame(), name, value,
                                        eventParameterName()));
     } else if (name == HTMLNames::onresizeAttr) {
@@ skipping 28 matching lines @@
   } else if (name == SVGNames::widthAttr || name == SVGNames::heightAttr) {
     SVGAnimatedLength* property =
         name == SVGNames::widthAttr ? m_width : m_height;
     SVGParsingError parseError;
     if (!value.isNull())
       parseError = property->setBaseValueAsString(value);
     if (parseError != SVGParseStatus::NoError || value.isNull())
       property->setDefaultValueAsString("100%");
     reportAttributeParsingError(parseError, name, value);
   } else {
-    SVGElement::parseAttribute(name, oldValue, value);
+    SVGElement::parseAttribute(params);
   }
 }
 
 bool SVGSVGElement::isPresentationAttribute(const QualifiedName& name) const {
   if ((name == SVGNames::widthAttr || name == SVGNames::heightAttr) &&
       !isOutermostSVGSVGElement())
     return false;
   return SVGGraphicsElement::isPresentationAttribute(name);
 }
 
@@ skipping 540 matching lines @@
   visitor->trace(m_width);
   visitor->trace(m_height);
   visitor->trace(m_translation);
   visitor->trace(m_timeContainer);
   visitor->trace(m_viewSpec);
   SVGGraphicsElement::trace(visitor);
   SVGFitToViewBox::trace(visitor);
 }
 
 }  // namespace blink