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

third_party/WebKit/Source/core/timing/PerformanceUserTiming.cpp

 /*
  * Copyright (C) 2012 Intel Inc. All rights reserved.
  *
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 113 matching lines @@
   return entry;
 }
 
 void UserTiming::clearMarks(const String& markName) {
   clearPeformanceEntries(m_marksMap, markName);
 }
 
 double UserTiming::findExistingMarkStartTime(const String& markName,
                                              ExceptionState& exceptionState) {
   if (m_marksMap.contains(markName))
-    return m_marksMap.get(markName).last()->startTime();
+    return m_marksMap.get(markName).back()->startTime();
 
   if (restrictedKeyMap().contains(markName) && m_performance->timing()) {
     double value = static_cast<double>(
         (m_performance->timing()->*(restrictedKeyMap().get(markName)))());
     if (!value) {
       exceptionState.throwDOMException(
           InvalidAccessError, "'" + markName +
                                   "' is empty: either the event hasn't "
                                   "happened yet, or it would provide "
                                   "cross-origin timing information.");
@@ skipping 100 matching lines @@
   return getEntrySequenceByName(m_measuresMap, name);
 }
 
 DEFINE_TRACE(UserTiming) {
   visitor->trace(m_performance);
   visitor->trace(m_marksMap);
   visitor->trace(m_measuresMap);
 }
 
 }  // namespace blink