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

third_party/WebKit/Source/core/html/parser/HTMLTreeBuilder.cpp

Index: third_party/WebKit/Source/core/html/parser/HTMLTreeBuilder.cpp
diff --git a/third_party/WebKit/Source/core/html/parser/HTMLTreeBuilder.cpp b/third_party/WebKit/Source/core/html/parser/HTMLTreeBuilder.cpp
index 0cc77df052f4844f0504e1b208073e6e9d98affd..7a48396f981a659d1de3d71333f47d2f5d487e36 100644
--- a/third_party/WebKit/Source/core/html/parser/HTMLTreeBuilder.cpp
+++ b/third_party/WebKit/Source/core/html/parser/HTMLTreeBuilder.cpp
@@ -1349,8 +1349,8 @@ void HTMLTreeBuilder::processStartTag(AtomicHTMLToken* token) {
         insertionMode = InBodyMode;
 
       ASSERT(insertionMode != TemplateContentsMode);
-      ASSERT(m_templateInsertionModes.last() == TemplateContentsMode);
-      m_templateInsertionModes.last() = insertionMode;
+      ASSERT(m_templateInsertionModes.back() == TemplateContentsMode);
+      m_templateInsertionModes.back() = insertionMode;
       setInsertionMode(insertionMode);
 
       processStartTag(token);
@@ -1526,7 +1526,7 @@ void HTMLTreeBuilder::resetInsertionModeAppropriately() {
         item = m_fragmentContext.contextElementStackItem();
     }
     if (item->hasTagName(templateTag))
-      return setInsertionMode(m_templateInsertionModes.last());
+      return setInsertionMode(m_templateInsertionModes.back());
     if (item->hasTagName(selectTag)) {
       if (!last) {
         while (item->node() != m_tree.openElements()->rootNode() &&