Migrate WTF::Vector::append() to ::push_back() [part 13 of N]

third_party/WebKit/Source/modules/accessibility/AXSpinButton.cpp

 /*
  * Copyright (C) 2011 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
@@ skipping 57 matching lines @@
 }
 
 void AXSpinButton::addChildren() {
   ASSERT(!isDetached());
   m_haveChildren = true;
 
   AXSpinButtonPart* incrementor =
       toAXSpinButtonPart(axObjectCache().getOrCreate(SpinButtonPartRole));
   incrementor->setIsIncrementor(true);
   incrementor->setParent(this);
-  m_children.append(incrementor);
+  m_children.push_back(incrementor);
 
   AXSpinButtonPart* decrementor =
       toAXSpinButtonPart(axObjectCache().getOrCreate(SpinButtonPartRole));
   decrementor->setIsIncrementor(false);
   decrementor->setParent(this);
-  m_children.append(decrementor);
+  m_children.push_back(decrementor);
 }
 
 void AXSpinButton::step(int amount) {
   ASSERT(m_spinButtonElement);
   if (!m_spinButtonElement)
     return;
 
   m_spinButtonElement->step(amount);
 }
 
@@ skipping 40 matching lines @@
   AXSpinButton* spinButton = toAXSpinButton(parentObject());
   if (m_isIncrementor)
     spinButton->step(1);
   else
     spinButton->step(-1);
 
   return true;
 }
 
 }  // namespace blink