Start removing the double-negative !ASSERT_DISABLED

Source/core/rendering/compositing/CompositedLayerMapping.cpp

Index: Source/core/rendering/compositing/CompositedLayerMapping.cpp
diff --git a/Source/core/rendering/compositing/CompositedLayerMapping.cpp b/Source/core/rendering/compositing/CompositedLayerMapping.cpp
index ae57053c77aea2f75fcce87cc25a3fbca1ae3137..6ef931465ca5ec2478a3b9b03b3f81c2d50b8031 100644
--- a/Source/core/rendering/compositing/CompositedLayerMapping.cpp
+++ b/Source/core/rendering/compositing/CompositedLayerMapping.cpp
@@ -1581,7 +1581,7 @@ bool CompositedLayerMapping::hasVisibleNonCompositingDescendant(RenderLayer* par
     // FIXME: We shouldn't be called with a stale z-order lists. See bug 85512.
     parent->stackingNode()->updateLayerListsIfNeeded();
 
-#if !ASSERT_DISABLED
+#if ASSERT_ENABLED
     LayerListMutationDetector mutationChecker(parent->stackingNode());
 #endif
 
@@ -1846,7 +1846,7 @@ void CompositedLayerMapping::clearNeedsGraphicsLayerUpdate()
     m_needToUpdateGraphicsLayerOfAllDecendants = false;
 }
 
-#if !ASSERT_DISABLED
+#if ASSERT_ENABLED
 
 void CompositedLayerMapping::assertNeedsToUpdateGraphicsLayerBitsCleared()
 {