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

third_party/WebKit/Source/core/fetch/Resource.cpp

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
     Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
     Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
     Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All
     rights reserved.
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
@@ skipping 548 matching lines @@
       return false;
   }
 
   return currentAge(response, responseTimestamp) <=
          freshnessLifetime(response, responseTimestamp);
 }
 
 const ResourceRequest& Resource::lastResourceRequest() const {
   if (!m_redirectChain.size())
     return m_resourceRequest;
-  return m_redirectChain.last().m_request;
+  return m_redirectChain.back().m_request;
 }
 
 void Resource::setRevalidatingRequest(const ResourceRequest& request) {
   SECURITY_CHECK(m_redirectChain.isEmpty());
   DCHECK(!request.isNull());
   m_isRevalidating = true;
   m_resourceRequest = request;
   m_status = NotStarted;
 }
 
@@ skipping 524 matching lines @@
     case Resource::TextTrack:
     case Resource::Media:
     case Resource::Manifest:
       return false;
   }
   NOTREACHED();
   return false;
 }
 
 }  // namespace blink