Migrate WTF::Vector::append() to ::push_back() [part 5 of N]

third_party/WebKit/Source/core/editing/commands/MergeIdenticalElementsCommand.cpp

 /*
  * Copyright (C) 2005, 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 60 matching lines @@
 
   DummyExceptionStateForTesting exceptionState;
 
   parent->insertBefore(m_element1.get(), m_element2.get(), exceptionState);
   if (exceptionState.hadException())
     return;
 
   HeapVector<Member<Node>> children;
   for (Node* child = m_element2->firstChild(); child && child != atChild;
        child = child->nextSibling())
-    children.append(child);
+    children.push_back(child);
 
   for (auto& child : children)
     m_element1->appendChild(child.release(), exceptionState);
 }
 
 DEFINE_TRACE(MergeIdenticalElementsCommand) {
   visitor->trace(m_element1);
   visitor->trace(m_element2);
   visitor->trace(m_atChild);
   SimpleEditCommand::trace(visitor);
 }
 
 }  // namespace blink