Drop const_iterator for AttributeCollection

Source/core/editing/markup.cpp

Index: Source/core/editing/markup.cpp
diff --git a/Source/core/editing/markup.cpp b/Source/core/editing/markup.cpp
index 9003c7451b87c23cb0c7ea6ec9028988a407cf93..817bc5f22021fe936ec89fc824f1da30b57b563f 100644
--- a/Source/core/editing/markup.cpp
+++ b/Source/core/editing/markup.cpp
@@ -116,8 +116,8 @@ static void completeURLs(DocumentFragment& fragment, const String& baseURL)
 
     for (Element* element = ElementTraversal::firstWithin(fragment); element; element = ElementTraversal::next(*element, &fragment)) {
         AttributeCollection attributes = element->attributes();
-        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) {
             if (element->isURLAttribute(*it) && !it->value().isEmpty())
                 changes.append(AttributeChange(element, it->name(), KURL(parsedBaseURL, it->value()).string()));
         }
@@ -296,8 +296,8 @@ void StyledMarkupAccumulator::appendElement(StringBuilder& out, Element& element
     const bool shouldOverrideStyleAttr = shouldAnnotateOrForceInline || shouldApplyWrappingStyle(element);
 
     AttributeCollection attributes = element.attributes();
-    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) {
         // We'll handle the style attribute separately, below.
         if (it->name() == styleAttr && shouldOverrideStyleAttr)
             continue;