WTF/std normalization: replace WTF::Vector::last with ::back

third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp

Index: third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp
diff --git a/third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp b/third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp
index a5e0f7125e574477ff0e9a7ae99f74b87aa91144..f9fdca6d20eb28b6259f917669b051107e529f60 100644
--- a/third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp
+++ b/third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp
@@ -307,7 +307,7 @@ void XMLDocumentParser::popCurrentNode() {
   if (!m_currentNode)
     return;
   DCHECK(m_currentNodeStack.size());
-  m_currentNode = m_currentNodeStack.last();
+  m_currentNode = m_currentNodeStack.back();
   m_currentNodeStack.pop_back();
 }
 
@@ -818,7 +818,7 @@ XMLDocumentParser::XMLDocumentParser(DocumentFragment* fragment,
     return;
 
   for (; !elemStack.isEmpty(); elemStack.pop_back()) {
-    Element* element = elemStack.last();
+    Element* element = elemStack.back();
     AttributeCollection attributes = element->attributes();
     for (auto& attribute : attributes) {
       if (attribute.localName() == xmlnsAtom)