cc: DCHECK that the OutputSurface was released in ~LayerTreeHostImpl().

cc/layers/picture_layer_unittest.cc

Index: cc/layers/picture_layer_unittest.cc
diff --git a/cc/layers/picture_layer_unittest.cc b/cc/layers/picture_layer_unittest.cc
index a5c7ede269ee12eb914f74ea00d68e39b72ec6f3..a1ff429918c22eb5791fff6b797a0dc04772f971 100644
--- a/cc/layers/picture_layer_unittest.cc
+++ b/cc/layers/picture_layer_unittest.cc
@@ -289,6 +289,7 @@ TEST(PictureLayerTest, InvalidateRasterAfterUpdate) {
   host_impl.CreatePendingTree();
   host_impl.pending_tree()->SetRootLayer(
       FakePictureLayerImpl::Create(host_impl.pending_tree(), 1));
+  host_impl.pending_tree()->BuildLayerListForTesting();
   FakePictureLayerImpl* layer_impl = static_cast<FakePictureLayerImpl*>(
       host_impl.pending_tree()->root_layer());
   layer->PushPropertiesTo(layer_impl);
@@ -331,6 +332,7 @@ TEST(PictureLayerTest, InvalidateRasterWithoutUpdate) {
   host_impl.CreatePendingTree();
   host_impl.pending_tree()->SetRootLayer(
       FakePictureLayerImpl::Create(host_impl.pending_tree(), 1));
+  host_impl.pending_tree()->BuildLayerListForTesting();
   FakePictureLayerImpl* layer_impl = static_cast<FakePictureLayerImpl*>(
       host_impl.pending_tree()->root_layer());
   layer->PushPropertiesTo(layer_impl);