Start removing the double-negative !ASSERT_DISABLED

Source/core/rendering/RenderLayer.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 2164 matching lines @@
     LayerPaintingInfo transformedPaintingInfo(this, enclosingIntRect(transform.inverse().mapRect(paintingInfo.paintDirtyRect)), paintingInfo.paintBehavior,
         adjustedSubPixelAccumulation, paintingInfo.paintingRoot, paintingInfo.overlapTestRequests);
     paintLayerContentsAndReflection(context, transformedPaintingInfo, paintFlags);
 }
 
 void RenderLayer::paintChildren(unsigned childrenToVisit, GraphicsContext* context, const LayerPaintingInfo& paintingInfo, PaintLayerFlags paintFlags)
 {
     if (!hasSelfPaintingLayerDescendant())
         return;
 
-#if !ASSERT_DISABLED
+#if ASSERT_ENABLED
     LayerListMutationDetector mutationChecker(m_stackingNode.get());
 #endif
 
     RenderLayerStackingNodeIterator iterator(*m_stackingNode, childrenToVisit);
     while (RenderLayerStackingNode* child = iterator.next()) {
         RenderLayer* childLayer = child->layer();
 
         // Squashed RenderLayers should not paint into their ancestor.
         if (childLayer->compositingState() == PaintsIntoGroupedBacking)
             continue;
@@ skipping 1103 matching lines @@
     LayoutPoint origin;
     LayoutRect result = physicalBoundingBox(ancestorLayer, &origin);
 
     if (m_reflectionInfo && !m_reflectionInfo->reflectionLayer()->hasCompositedLayerMapping())
         result.unite(m_reflectionInfo->reflectionLayer()->physicalBoundingBox(this));
 
     ASSERT(m_stackingNode->isStackingContext() || !m_stackingNode->hasPositiveZOrderList());
 
     const_cast<RenderLayer*>(this)->stackingNode()->updateLayerListsIfNeeded();
 
-#if !ASSERT_DISABLED
+#if ASSERT_ENABLED
     LayerListMutationDetector mutationChecker(const_cast<RenderLayer*>(this)->stackingNode());
 #endif
 
     RenderLayerStackingNodeIterator iterator(*m_stackingNode.get(), AllChildren);
     while (RenderLayerStackingNode* node = iterator.next()) {
         if (node->layer()->hasCompositedLayerMapping())
             continue;
         // FIXME: Can we call physicalBoundingBoxIncludingReflectionAndStackingChildren instead of boundingBoxForCompositing?
         result.unite(node->layer()->boundingBoxForCompositing(this));
     }
@@ skipping 49 matching lines @@
     LayoutPoint origin;
     LayoutRect result = physicalBoundingBox(ancestorLayer, &origin);
 
     const_cast<RenderLayer*>(this)->stackingNode()->updateLayerListsIfNeeded();
 
     if (m_reflectionInfo && !m_reflectionInfo->reflectionLayer()->hasCompositedLayerMapping())
         result.unite(m_reflectionInfo->reflectionLayer()->boundingBoxForCompositing(this));
 
     ASSERT(m_stackingNode->isStackingContext() || !m_stackingNode->hasPositiveZOrderList());
 
-#if !ASSERT_DISABLED
+#if ASSERT_ENABLED
     LayerListMutationDetector mutationChecker(const_cast<RenderLayer*>(this)->stackingNode());
 #endif
 
     // Reflections are implemented with RenderLayers that hang off of the reflected layer. However,
     // the reflection layer subtree does not include the subtree of the parent RenderLayer, so
     // a recursive computation of stacking children yields no results. This breaks cases when there are stacking
     // children of the parent, that need to be included in reflected composited bounds.
     // Fix this by including composited bounds of stacking children of the reflected RenderLayer.
     if (parent() && parent()->reflectionInfo() && parent()->reflectionInfo()->reflectionLayer() == this)
         expandCompositingRectForStackingChildren(parent(), options, result);
@@ skipping 474 matching lines @@
     }
 }
 
 void showLayerTree(const WebCore::RenderObject* renderer)
 {
     if (!renderer)
         return;
     showLayerTree(renderer->enclosingLayer());
 }
 #endif