DCHECK that property tree access is safe in LayerTreeImpl::DidUpdateScrollState

cc/test/push_properties_counting_layer_impl.cc

Index: cc/test/push_properties_counting_layer_impl.cc
diff --git a/cc/test/push_properties_counting_layer_impl.cc b/cc/test/push_properties_counting_layer_impl.cc
index 523317081263c31af0358f5c19ab073f091ac0e9..13659b4d45c31e1decb5abe032ae834fa5d153ec 100644
--- a/cc/test/push_properties_counting_layer_impl.cc
+++ b/cc/test/push_properties_counting_layer_impl.cc
@@ -15,9 +15,7 @@ PushPropertiesCountingLayerImpl::Create(LayerTreeImpl* tree_impl, int id) {
 PushPropertiesCountingLayerImpl::PushPropertiesCountingLayerImpl(
     LayerTreeImpl* tree_impl,
     int id)
-    : LayerImpl(tree_impl, id), push_properties_count_(0) {
-  SetBounds(gfx::Size(1, 1));
-}
+    : LayerImpl(tree_impl, id), push_properties_count_(0) {}
 
 PushPropertiesCountingLayerImpl::~PushPropertiesCountingLayerImpl() = default;