Replace ENABLE(ASSERT) with DCHECK_IS_ON().

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 53 matching lines @@
   // If this layer has a compositedLayerMapping, then that is where we place
   // subsequent children GraphicsLayers.  Otherwise children continue to append
   // to the child list of the enclosing layer.
   GraphicsLayerVector layerChildren;
   AncestorInfo infoForChildren(info);
   if (hasCompositedLayerMapping) {
     infoForChildren.childLayersOfEnclosingCompositedLayer = &layerChildren;
     infoForChildren.enclosingCompositedLayer = &layer;
   }
 
-#if ENABLE(ASSERT)
+#if DCHECK_IS_ON()
   LayerListMutationDetector mutationChecker(layer.stackingNode());
 #endif
 
   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
@@ skipping 29 matching lines @@
           ->compositedLayerMapping()
           ->needsToReparentOverflowControls() &&
       layer.scrollParent()->getScrollableArea()->topmostScrollChild() == &layer)
     info.childLayersOfEnclosingCompositedLayer->push_back(
         layer.scrollParent()
             ->compositedLayerMapping()
             ->detachLayerForOverflowControls(*info.enclosingCompositedLayer));
 }
 
 }  // namespace blink