Rename ElementData's attribute related methods for clarity

Source/core/html/parser/HTMLConstructionSite.cpp

Index: Source/core/html/parser/HTMLConstructionSite.cpp
diff --git a/Source/core/html/parser/HTMLConstructionSite.cpp b/Source/core/html/parser/HTMLConstructionSite.cpp
index 74390aa2b5be99c4d31b8121582df16d74bf14ba..01507c899bf2efb411fb192b06246a47d1d77bd0 100644
--- a/Source/core/html/parser/HTMLConstructionSite.cpp
+++ b/Source/core/html/parser/HTMLConstructionSite.cpp
@@ -407,7 +407,7 @@ void HTMLConstructionSite::mergeAttributesFromTokenIntoElement(AtomicHTMLToken*
 
     for (unsigned i = 0; i < token->attributes().size(); ++i) {
         const Attribute& tokenAttribute = token->attributes().at(i);
-        if (!element->elementData() || !element->getAttributeItem(tokenAttribute.name()))
+        if (!element->elementData() || !element->findAttributeByName(tokenAttribute.name()))
             element->setAttribute(tokenAttribute.name(), tokenAttribute.value());
     }
 }