Migrate WTF::Vector::append() to ::push_back() [part 9 of N]

third_party/WebKit/Source/core/layout/FlexibleBoxAlgorithm.cpp

 /*
  * Copyright (C) 2011 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 60 matching lines @@
   bool lineHasInFlowItem = false;
 
   for (; nextIndex < m_allItems.size(); ++nextIndex) {
     const FlexItem& flexItem = m_allItems[nextIndex];
     DCHECK(!flexItem.box->isOutOfFlowPositioned());
     if (isMultiline() &&
         sumHypotheticalMainSize + flexItem.hypotheticalMainAxisMarginBoxSize() >
             m_lineBreakLength &&
         lineHasInFlowItem)
       break;
-    lineItems.append(flexItem);
+    lineItems.push_back(flexItem);
     lineHasInFlowItem = true;
     sumFlexBaseSize += flexItem.flexBaseMarginBoxSize();
     totalFlexGrow += flexItem.box->style()->flexGrow();
     totalFlexShrink += flexItem.box->style()->flexShrink();
     totalWeightedFlexShrink +=
         flexItem.box->style()->flexShrink() * flexItem.flexBaseContentSize;
     sumHypotheticalMainSize += flexItem.hypotheticalMainAxisMarginBoxSize();
   }
   DCHECK(lineItems.size() > 0 || nextIndex == m_allItems.size());
   return lineItems.size() > 0;
 }
 
 }  // namespace blink