cc: Add verify transform tree calculations to LayerTreeSettings

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 2d5874c1485396b3271680b32224b8db0b1fd514..5a2e767cfe21f57f7794536e2d5573606dc4c175 100644
--- a/cc/layers/picture_layer_unittest.cc
+++ b/cc/layers/picture_layer_unittest.cc
@@ -462,6 +462,7 @@ TEST(PictureLayerTest, NonMonotonicSourceFrameNumber) {
   settings.single_thread_proxy_scheduler = false;
   settings.use_zero_copy = true;
   settings.verify_clip_tree_calculations = true;
+  settings.verify_transform_tree_calculations = true;
 
   FakeLayerTreeHostClient host_client1(FakeLayerTreeHostClient::DIRECT_3D);
   FakeLayerTreeHostClient host_client2(FakeLayerTreeHostClient::DIRECT_3D);