Move parts of core/dom to C++11

Source/core/dom/DatasetDOMStringMap.cpp

Index: Source/core/dom/DatasetDOMStringMap.cpp
diff --git a/Source/core/dom/DatasetDOMStringMap.cpp b/Source/core/dom/DatasetDOMStringMap.cpp
index 56207a854597bf45c6a4a79b075f96bcb587a8e4..89e5dd83d9201db7a7ee4d6625e29ed2a2389077 100644
--- a/Source/core/dom/DatasetDOMStringMap.cpp
+++ b/Source/core/dom/DatasetDOMStringMap.cpp
@@ -155,20 +155,18 @@ void DatasetDOMStringMap::deref()
 void DatasetDOMStringMap::getNames(Vector<String>& names)
 {
     AttributeCollection attributes = m_element->attributes();
-    AttributeCollection::iterator end = attributes.end();
-    for (AttributeCollection::iterator it = attributes.begin(); it != end; ++it) {
-        if (isValidAttributeName(it->localName()))
-            names.append(convertAttributeNameToPropertyName(it->localName()));
+    for (const Attribute& attr : attributes) {
+        if (isValidAttributeName(attr.localName()))
+            names.append(convertAttributeNameToPropertyName(attr.localName()));
     }
 }
 
 String DatasetDOMStringMap::item(const String& name)
 {
     AttributeCollection attributes = m_element->attributes();
-    AttributeCollection::iterator end = attributes.end();
-    for (AttributeCollection::iterator it = attributes.begin(); it != end; ++it) {
-        if (propertyNameMatchesAttributeName(name, it->localName()))
-            return it->value();
+    for (const Attribute& attr : attributes) {
+        if (propertyNameMatchesAttributeName(name, attr.localName()))
+            return attr.value();
     }
 
     return String();
@@ -177,9 +175,8 @@ String DatasetDOMStringMap::item(const String& name)
 bool DatasetDOMStringMap::contains(const String& name)
 {
     AttributeCollection attributes = m_element->attributes();
-    AttributeCollection::iterator end = attributes.end();
-    for (AttributeCollection::iterator it = attributes.begin(); it != end; ++it) {
-        if (propertyNameMatchesAttributeName(name, it->localName()))
+    for (const Attribute& attr : attributes) {
+        if (propertyNameMatchesAttributeName(name, attr.localName()))
             return true;
     }
     return false;