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

third_party/WebKit/Source/core/style/QuotesData.cpp

Index: third_party/WebKit/Source/core/style/QuotesData.cpp
diff --git a/third_party/WebKit/Source/core/style/QuotesData.cpp b/third_party/WebKit/Source/core/style/QuotesData.cpp
index 3a26e4ad34d0dec3519151a6d34d82e52328615b..470dbac98caf02af091bbe76709c00544b68e369 100644
--- a/third_party/WebKit/Source/core/style/QuotesData.cpp
+++ b/third_party/WebKit/Source/core/style/QuotesData.cpp
@@ -42,7 +42,7 @@ const String QuotesData::getOpenQuote(int index) const {
   if (!m_quotePairs.size() || index < 0)
     return emptyString();
   if ((size_t)index >= m_quotePairs.size())
-    return m_quotePairs.last().first;
+    return m_quotePairs.back().first;
   return m_quotePairs.at(index).first;
 }
 
@@ -51,7 +51,7 @@ const String QuotesData::getCloseQuote(int index) const {
   if (!m_quotePairs.size() || index < 0)
     return emptyString();
   if ((size_t)index >= m_quotePairs.size())
-    return m_quotePairs.last().second;
+    return m_quotePairs.back().second;
   return m_quotePairs.at(index).second;
 }