WTF/std normalization: replace WTF::Vector::first() with ::front()

third_party/WebKit/Source/core/xml/XPathNodeSet.cpp

 /*
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 207 matching lines @@
   for (unsigned i = 0; i < nodeCount; ++i) {
     Node* node = m_nodes[i].get();
     nodes.add(node);
     if (node->isAttributeNode())
       containsAttributeNodes = true;
   }
 
   HeapVector<Member<Node>> sortedNodes;
   sortedNodes.reserveInitialCapacity(nodeCount);
 
-  for (Node& n : NodeTraversal::startsAt(*findRootNode(m_nodes.first()))) {
+  for (Node& n : NodeTraversal::startsAt(*findRootNode(m_nodes.front()))) {
     if (nodes.contains(&n))
       sortedNodes.append(&n);
 
     if (!containsAttributeNodes || !n.isElementNode())
       continue;
 
     Element* element = toElement(&n);
     AttributeCollection attributes = element->attributes();
     for (auto& attribute : attributes) {
       Attr* attr = element->attrIfExists(attribute.name());
@@ skipping 31 matching lines @@
 
 Node* NodeSet::anyNode() const {
   if (isEmpty())
     return nullptr;
 
   return m_nodes.at(0).get();
 }
 
 }  // namespace XPath
 }  // namespace blink