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

third_party/WebKit/Source/core/layout/compositing/GraphicsLayerTreeBuilder.cpp

 /*
  * Copyright (C) 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2014 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:
  * 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 67 matching lines @@
   if (layer.stackingNode()->isStackingContext()) {
     PaintLayerStackingNodeIterator iterator(*layer.stackingNode(),
                                             NegativeZOrderChildren);
     while (PaintLayerStackingNode* curNode = iterator.next())
       rebuild(*curNode->layer(), infoForChildren);
 
     // If a negative z-order child is compositing, we get a foreground layer
     // which needs to get parented.
     if (hasCompositedLayerMapping &&
         currentCompositedLayerMapping->foregroundLayer())
-      infoForChildren.childLayersOfEnclosingCompositedLayer->append(
+      infoForChildren.childLayersOfEnclosingCompositedLayer->push_back(
           currentCompositedLayerMapping->foregroundLayer());
   }
 
   PaintLayerStackingNodeIterator iterator(
       *layer.stackingNode(), NormalFlowChildren | PositiveZOrderChildren);
   while (PaintLayerStackingNode* curNode = iterator.next())
     rebuild(*curNode->layer(), infoForChildren);
 
   if (hasCompositedLayerMapping) {
     bool parented = false;
     if (layer.layoutObject()->isLayoutPart())
       parented = PaintLayerCompositor::attachFrameContentLayersToIframeLayer(
           toLayoutPart(layer.layoutObject()));
 
     if (!parented)
       currentCompositedLayerMapping->setSublayers(layerChildren);
 
     if (shouldAppendLayer(layer))
-      info.childLayersOfEnclosingCompositedLayer->append(
+      info.childLayersOfEnclosingCompositedLayer->push_back(
           currentCompositedLayerMapping->childForSuperlayers());
   }
 
   if (layer.scrollParent() &&
       layer.scrollParent()->hasCompositedLayerMapping() &&
       layer.scrollParent()
           ->compositedLayerMapping()
           ->needsToReparentOverflowControls() &&
       layer.scrollParent()->getScrollableArea()->topmostScrollChild() == &layer)
-    info.childLayersOfEnclosingCompositedLayer->append(
+    info.childLayersOfEnclosingCompositedLayer->push_back(
         layer.scrollParent()
             ->compositedLayerMapping()
             ->detachLayerForOverflowControls(*info.enclosingCompositedLayer));
 }
 
 }  // namespace blink