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

third_party/WebKit/Source/core/layout/ColumnBalancer.cpp

 // 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.
 
 #include "core/layout/ColumnBalancer.h"
 
 #include "core/layout/LayoutMultiColumnFlowThread.h"
 #include "core/layout/LayoutMultiColumnSet.h"
 #include "core/layout/api/LineLayoutBlockFlow.h"
 
@@ skipping 261 matching lines @@
     if (m_shortestStruts[i] != LayoutUnit::max())
       totalStrutSpace += m_shortestStruts[i];
   }
   return totalStrutSpace;
 }
 
 void InitialColumnHeightFinder::addContentRun(
     LayoutUnit endOffsetInFlowThread) {
   endOffsetInFlowThread -= spaceUsedByStrutsAt(endOffsetInFlowThread);
   if (!m_contentRuns.isEmpty() &&
-      endOffsetInFlowThread <= m_contentRuns.last().breakOffset())
+      endOffsetInFlowThread <= m_contentRuns.back().breakOffset())
     return;
   // Append another item as long as we haven't exceeded used column count. What
   // ends up in the overflow area shouldn't affect column balancing. However, if
   // we're in a nested fragmentation context, we may still need to record all
   // runs, since there'll be no overflow area in the inline direction then, but
   // rather additional rows of columns in multiple outer fragmentainers.
   if (m_contentRuns.size() >= columnSet().usedColumnCount()) {
     const auto* flowThread = columnSet().multiColumnFlowThread();
     if (!flowThread->enclosingFragmentationContext() ||
         columnSet().newFragmentainerGroupsAllowed())
@@ skipping 189 matching lines @@
   if (group.columnLogicalTopForOffset(lineTopInFlowThread) !=
       group.columnLogicalTopForOffset(lineBottomWithOverflow)) {
     LayoutUnit shortage =
         lineBottomWithOverflow -
         group.columnLogicalTopForOffset(lineBottomWithOverflow);
     recordSpaceShortage(shortage);
   }
 }
 
 }  // namespace blink