Migrate WTF::Vector::append() to ::push_back() [part 4 of N]

third_party/WebKit/Source/core/dom/custom/CustomElementReactionTestHelpers.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.
 
 #include "core/dom/custom/CustomElementReaction.h"
 
 #include "core/dom/custom/CustomElementReactionQueue.h"
 #include "core/dom/custom/CustomElementReactionStack.h"
 #include "platform/heap/Handle.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 92 matching lines @@
 
 class TestReaction : public CustomElementReaction {
   WTF_MAKE_NONCOPYABLE(TestReaction);
 
  public:
   TestReaction(std::initializer_list<Command*> commands)
       : CustomElementReaction(nullptr) {
     // TODO(dominicc): Simply pass the initializer list when
     // HeapVector supports initializer lists like Vector.
     for (auto& command : commands)
-      m_commands.append(command);
+      m_commands.push_back(command);
   }
   ~TestReaction() override = default;
   DEFINE_INLINE_VIRTUAL_TRACE() {
     CustomElementReaction::trace(visitor);
     visitor->trace(m_commands);
   }
   void invoke(Element* element) override {
     for (auto& command : m_commands)
       command->run(element);
   }
@@ skipping 18 matching lines @@
   }
 
   CustomElementReactionStack& stack() { return *m_stack; }
 
  private:
   Member<CustomElementReactionStack> m_stack;
   Member<CustomElementReactionStack> m_oldStack;
 };
 
 }  // namespace blink