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

third_party/WebKit/Source/core/layout/MultiColumnFragmentainerGroup.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MultiColumnFragmentainerGroup_h
 #define MultiColumnFragmentainerGroup_h
 
 #include "core/layout/LayoutMultiColumnFlowThread.h"
 #include "wtf/Allocator.h"
 
@@ skipping 143 matching lines @@
   // it.
   MultiColumnFragmentainerGroup& addExtraGroup();
 
   // Remove all fragmentainer groups but the first one.
   void deleteExtraGroups();
 
   MultiColumnFragmentainerGroup& first() { return m_groups.first(); }
   const MultiColumnFragmentainerGroup& first() const {
     return m_groups.first();
   }
-  MultiColumnFragmentainerGroup& last() { return m_groups.last(); }
-  const MultiColumnFragmentainerGroup& last() const { return m_groups.last(); }
+  MultiColumnFragmentainerGroup& last() { return m_groups.back(); }
+  const MultiColumnFragmentainerGroup& last() const { return m_groups.back(); }
 
   typedef Vector<MultiColumnFragmentainerGroup, 1>::iterator iterator;
   typedef Vector<MultiColumnFragmentainerGroup, 1>::const_iterator
       const_iterator;
 
   iterator begin() { return m_groups.begin(); }
   const_iterator begin() const { return m_groups.begin(); }
   iterator end() { return m_groups.end(); }
   const_iterator end() const { return m_groups.end(); }
 
@@ skipping 10 matching lines @@
 
  private:
   LayoutMultiColumnSet& m_columnSet;
 
   Vector<MultiColumnFragmentainerGroup, 1> m_groups;
 };
 
 }  // namespace blink
 
 #endif  // MultiColumnFragmentainerGroup_h