Index: cc/tree_synchronizer.cc |
diff --git a/cc/tree_synchronizer.cc b/cc/tree_synchronizer.cc |
index 17f237a467001b8819c88d33e3be5948880d6bf5..ea3cb1d64b0ba5c8839cc9bbcb9fd770a01cc032 100644 |
--- a/cc/tree_synchronizer.cc |
+++ b/cc/tree_synchronizer.cc |
@@ -15,6 +15,8 @@ namespace cc { |
scoped_ptr<LayerImpl> TreeSynchronizer::synchronizeTrees(Layer* layerRoot, scoped_ptr<LayerImpl> oldLayerImplRoot, LayerTreeImpl* treeImpl) |
{ |
+ DCHECK(treeImpl); |
+ |
TRACE_EVENT0("cc", "TreeSynchronizer::synchronizeTrees"); |
ScopedPtrLayerImplMap oldLayers; |
RawPtrLayerImplMap newLayers; |