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

third_party/WebKit/Source/platform/graphics/paint/PaintChunker.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 "platform/graphics/paint/PaintChunker.h"
 
 #include "platform/RuntimeEnabledFeatures.h"
 
 namespace blink {
 
@@ skipping 54 matching lines @@
   }
 
   if (m_chunks.isEmpty()) {
     PaintChunk newChunk(0, 1, newChunkId ? &*newChunkId : nullptr,
                         m_currentProperties);
     m_chunks.append(newChunk);
     m_chunkBehavior.append(behavior);
     return true;
   }
 
-  auto& lastChunk = m_chunks.last();
+  auto& lastChunk = m_chunks.back();
   bool canContinueChunk = m_currentProperties == lastChunk.properties &&
                           behavior != RequiresSeparateChunk &&
-                          m_chunkBehavior.last() != RequiresSeparateChunk;
+                          m_chunkBehavior.back() != RequiresSeparateChunk;
   if (canContinueChunk) {
     lastChunk.endIndex++;
     return false;
   }
 
   PaintChunk newChunk(lastChunk.endIndex, lastChunk.endIndex + 1,
                       newChunkId ? &*newChunkId : nullptr, m_currentProperties);
   m_chunks.append(newChunk);
   m_chunkBehavior.append(behavior);
   return true;
 }
 
 bool PaintChunker::decrementDisplayItemIndex() {
   DCHECK(RuntimeEnabledFeatures::slimmingPaintV2Enabled());
   DCHECK(!m_chunks.isEmpty());
 
-  auto& lastChunk = m_chunks.last();
+  auto& lastChunk = m_chunks.back();
   if ((lastChunk.endIndex - lastChunk.beginIndex) > 1) {
     lastChunk.endIndex--;
     return false;
   }
 
   m_chunks.pop_back();
   m_chunkBehavior.pop_back();
   return true;
 }
 
 void PaintChunker::clear() {
   m_chunks.clear();
   m_chunkBehavior.clear();
   m_currentChunkId = WTF::nullopt;
   m_currentProperties = PaintChunkProperties();
 }
 
 Vector<PaintChunk> PaintChunker::releasePaintChunks() {
   Vector<PaintChunk> chunks;
   chunks.swap(m_chunks);
   m_chunkBehavior.clear();
   m_currentChunkId = WTF::nullopt;
   m_currentProperties = PaintChunkProperties();
   return chunks;
 }
 
 }  // namespace blink