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

third_party/WebKit/Source/core/dom/custom/CustomElementTestHelpers.h

 // Copyright 2016 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.
 
 #ifndef CustomElementTestHelpers_h
 #define CustomElementTestHelpers_h
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
@@ skipping 36 matching lines @@
 
   TestCustomElementDefinition(const CustomElementDescriptor& descriptor,
                               const HashSet<AtomicString>& observedAttributes)
       : CustomElementDefinition(descriptor, observedAttributes) {}
 
   ~TestCustomElementDefinition() override = default;
 
   ScriptValue getConstructorForScript() override { return ScriptValue(); }
 
   bool runConstructor(Element* element) override {
-    if (constructionStack().isEmpty() || constructionStack().last() != element)
+    if (constructionStack().isEmpty() || constructionStack().back() != element)
       return false;
-    constructionStack().last().clear();
+    constructionStack().back().clear();
     return true;
   }
 
   HTMLElement* createElementSync(Document& document,
                                  const QualifiedName&) override {
     return createElementForConstructor(document);
   }
 
   bool hasConnectedCallback() const override { return false; }
   bool hasDisconnectedCallback() const override { return false; }
@@ skipping 62 matching lines @@
  private:
   Member<Document> m_document;
   AtomicString m_namespaceURI;
   AtomicString m_localName;
   std::vector<std::pair<QualifiedName, AtomicString>> m_attributes;
 };
 
 }  // namespace blink
 
 #endif  // CustomElementTestHelpers_h