Start removing the double-negative !ASSERT_DISABLED

Source/core/rendering/RenderLayerStackingNode.h

 /*
  * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. 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>
@@ skipping 77 matching lines @@
     void updateStackingNodesAfterStyleChange(const RenderStyle* oldStyle);
 
     RenderLayerStackingNode* ancestorStackingContextNode() const;
 
     // Gets the enclosing stacking context for this node, possibly the node
     // itself, if it is a stacking context.
     RenderLayerStackingNode* enclosingStackingContextNode() { return isStackingContext() ? this : ancestorStackingContextNode(); }
 
     RenderLayer* layer() const { return m_layer; }
 
-#if !ASSERT_DISABLED
+#if ASSERT_ENABLED
     bool layerListMutationAllowed() const { return m_layerListMutationAllowed; }
     void setLayerListMutationAllowed(bool flag) { m_layerListMutationAllowed = flag; }
 #endif
 
 private:
     friend class RenderLayerStackingNodeIterator;
     friend class RenderLayerStackingNodeReverseIterator;
     friend class RenderTreeAsText;
 
     Vector<RenderLayerStackingNode*>* posZOrderList() const
@@ skipping 12 matching lines @@
     Vector<RenderLayerStackingNode*>* negZOrderList() const
     {
         ASSERT(!m_zOrderListsDirty);
         ASSERT(isStackingContext() || !m_negZOrderList);
         return m_negZOrderList.get();
     }
 
     void rebuildZOrderLists();
     void collectLayers(OwnPtr<Vector<RenderLayerStackingNode*> >& posZOrderList, OwnPtr<Vector<RenderLayerStackingNode*> >& negZOrderList);
 
-#if !ASSERT_DISABLED
+#if ASSERT_ENABLED
     bool isInStackingParentZOrderLists() const;
     bool isInStackingParentNormalFlowList() const;
     void updateStackingParentForZOrderLists(RenderLayerStackingNode* stackingParent);
     void updateStackingParentForNormalFlowList(RenderLayerStackingNode* stackingParent);
     void setStackingParent(RenderLayerStackingNode* stackingParent) { m_stackingParent = stackingParent; }
 #endif
 
     bool shouldBeNormalFlowOnly() const;
 
     void updateNormalFlowList();
@@ skipping 13 matching lines @@
     OwnPtr<Vector<RenderLayerStackingNode*> > m_posZOrderList;
     OwnPtr<Vector<RenderLayerStackingNode*> > m_negZOrderList;
 
     // This list contains child nodes that cannot create stacking contexts.
     OwnPtr<Vector<RenderLayerStackingNode*> > m_normalFlowList;
 
     unsigned m_zOrderListsDirty : 1;
     unsigned m_normalFlowListDirty: 1;
     unsigned m_isNormalFlowOnly : 1;
 
-#if !ASSERT_DISABLED
+#if ASSERT_ENABLED
     unsigned m_layerListMutationAllowed : 1;
     RenderLayerStackingNode* m_stackingParent;
 #endif
 };
 
 inline void RenderLayerStackingNode::clearZOrderLists()
 {
     ASSERT(!isStackingContext());
 
-#if !ASSERT_DISABLED
+#if ASSERT_ENABLED
     updateStackingParentForZOrderLists(0);
 #endif
 
     m_posZOrderList.clear();
     m_negZOrderList.clear();
 }
 
 inline void RenderLayerStackingNode::updateZOrderLists()
 {
     if (!m_zOrderListsDirty)
         return;
 
     if (!isStackingContext()) {
         clearZOrderLists();
         m_zOrderListsDirty = false;
         return;
     }
 
     rebuildZOrderLists();
 }
 
-#if !ASSERT_DISABLED
+#if ASSERT_ENABLED
 class LayerListMutationDetector {
 public:
     explicit LayerListMutationDetector(RenderLayerStackingNode* stackingNode)
         : m_stackingNode(stackingNode)
         , m_previousMutationAllowedState(stackingNode->layerListMutationAllowed())
     {
         m_stackingNode->setLayerListMutationAllowed(false);
     }
 
     ~LayerListMutationDetector()
     {
         m_stackingNode->setLayerListMutationAllowed(m_previousMutationAllowedState);
     }
 
 private:
     RenderLayerStackingNode* m_stackingNode;
     bool m_previousMutationAllowedState;
 };
 #endif
 
 } // namespace WebCore
 
 #endif // RenderLayerStackingNode_h