Replace ENABLE(ASSERT) with DCHECK_IS_ON().

third_party/WebKit/Source/core/layout/compositing/GraphicsLayerUpdater.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 102 matching lines @@
     }
   }
 
   UpdateContext childContext(context, layer);
   for (PaintLayer* child = layer.firstChild(); child;
        child = child->nextSibling())
     updateRecursive(*child, updateType, childContext,
                     layersNeedingPaintInvalidation);
 }
 
-#if ENABLE(ASSERT)
+#if DCHECK_IS_ON()
 
 void GraphicsLayerUpdater::assertNeedsToUpdateGraphicsLayerBitsCleared(
     PaintLayer& layer) {
   if (layer.hasCompositedLayerMapping())
     layer.compositedLayerMapping()
         ->assertNeedsToUpdateGraphicsLayerBitsCleared();
 
   for (PaintLayer* child = layer.firstChild(); child;
        child = child->nextSibling())
     assertNeedsToUpdateGraphicsLayerBitsCleared(*child);
 }
 
 #endif
 
 }  // namespace blink