Drop const_iterator for AttributeCollection

Source/core/css/SelectorChecker.cpp

Index: Source/core/css/SelectorChecker.cpp
diff --git a/Source/core/css/SelectorChecker.cpp b/Source/core/css/SelectorChecker.cpp
index 23f3acaf0412256026b41d82a76278b30d4ec907..6fefb1d0318afab616d3682201442ca6d8c6d000 100644
--- a/Source/core/css/SelectorChecker.cpp
+++ b/Source/core/css/SelectorChecker.cpp
@@ -467,8 +467,8 @@ static bool anyAttributeMatches(Element& element, CSSSelector::Match match, cons
     bool caseInsensitive = selector.attributeMatchType() == CSSSelector::CaseInsensitive;
 
     AttributeCollection attributes = element.attributesWithoutUpdate();
-    AttributeCollection::const_iterator end = attributes.end();
-    for (AttributeCollection::const_iterator it = attributes.begin(); it != end; ++it) {
+    AttributeCollection::iterator end = attributes.end();
+    for (AttributeCollection::iterator it = attributes.begin(); it != end; ++it) {
         const Attribute& attributeItem = *it;
 
         if (!attributeItem.matches(selectorAttr))