base: Change DCHECK_IS_ON to a macro DCHECK_IS_ON().

cc/layers/picture_layer_impl.cc

Index: cc/layers/picture_layer_impl.cc
diff --git a/cc/layers/picture_layer_impl.cc b/cc/layers/picture_layer_impl.cc
index ad3060076e55220510d0b1f7e75e0f634496b8d4..7a090cd468cbc6ffbb79e9bd54e3757ea6d3688a 100644
--- a/cc/layers/picture_layer_impl.cc
+++ b/cc/layers/picture_layer_impl.cc
@@ -1131,7 +1131,7 @@ bool PictureLayerImpl::CanHaveTilings() const {
 }
 
 void PictureLayerImpl::SanityCheckTilingState() const {
-#if DCHECK_IS_ON
+#if !DCHECK_IS_OFF
   // Recycle tree doesn't have any restrictions.
   if (layer_tree_impl()->IsRecycleTree())
     return;