Replace ENABLE(ASSERT) with DCHECK_IS_ON().

third_party/WebKit/Source/core/paint/PaintLayerPainter.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/paint/PaintLayerPainter.h"
 
 #include "core/frame/LocalFrame.h"
 #include "core/layout/LayoutView.h"
 #include "core/paint/ClipPathClipper.h"
 #include "core/paint/FilterPainter.h"
@@ skipping 795 matching lines @@
 
 PaintResult PaintLayerPainter::paintChildren(
     unsigned childrenToVisit,
     GraphicsContext& context,
     const PaintLayerPaintingInfo& paintingInfo,
     PaintLayerFlags paintFlags) {
   PaintResult result = FullyPainted;
   if (!m_paintLayer.hasSelfPaintingLayerDescendant())
     return result;
 
-#if ENABLE(ASSERT)
+#if DCHECK_IS_ON()
   LayerListMutationDetector mutationChecker(m_paintLayer.stackingNode());
 #endif
 
   PaintLayerStackingNodeIterator iterator(*m_paintLayer.stackingNode(),
                                           childrenToVisit);
   PaintLayerStackingNode* child = iterator.next();
   if (!child)
     return result;
 
   IntSize scrollOffsetAccumulationForChildren =
@@ skipping 351 matching lines @@
           context, layoutObject, PaintPhaseClippingMask))
     return;
 
   IntRect snappedClipRect = pixelSnappedIntRect(clipRect.rect());
   LayoutObjectDrawingRecorder drawingRecorder(
       context, layoutObject, PaintPhaseClippingMask, snappedClipRect);
   context.fillRect(snappedClipRect, Color::black);
 }
 
 }  // namespace blink